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Questions and Answers
In which sequence do the three generations of kidneys develop chronologically?
In which sequence do the three generations of kidneys develop chronologically?
- Metanephros, mesonephros, pronephros
- Pronephros, mesonephros, metanephros (correct)
- Mesonephros, metanephros, pronephros
- Mesonephros, pronephros, metanephros
Which structure is responsible for urine production and collecting ducts?
Which structure is responsible for urine production and collecting ducts?
- Urogenital ridge
- Nephrogenic cord (correct)
- Paraxial mesoderm
- Gonadal ridge
Which excretory organ is limited to the embryonic stage of fish and amphibians?
Which excretory organ is limited to the embryonic stage of fish and amphibians?
- Metanephros
- Pronephros (correct)
- Nephrogenic cord
- Mesonephros
What is the embryological origin of the urinary system?
What is the embryological origin of the urinary system?
What is the result of the proliferation of metanephric mesoderm in the development of the urinary system in embryos?
What is the result of the proliferation of metanephric mesoderm in the development of the urinary system in embryos?
What does the metanephric tubule expand to form in the development of the urinary system in embryos?
What does the metanephric tubule expand to form in the development of the urinary system in embryos?
What is a characteristic of polycystic kidney disease?
What is a characteristic of polycystic kidney disease?
What causes the kidney to be initially lobulated during development?
What causes the kidney to be initially lobulated during development?
What does the partition of the cloaca form during urinary system development?
What does the partition of the cloaca form during urinary system development?
What are the three phases of kidney development?
What are the three phases of kidney development?
Which component is responsible for conveying the primary urine in nephrons?
Which component is responsible for conveying the primary urine in nephrons?
What gives rise to the definitive urinary collecting system and the nephrons in the metanephros?
What gives rise to the definitive urinary collecting system and the nephrons in the metanephros?
Which generation of renal primordia briefly develops in the cervical region?
Which generation of renal primordia briefly develops in the cervical region?
What is responsible for distension and dilation of the collecting system in hydronephrosis?
What is responsible for distension and dilation of the collecting system in hydronephrosis?
Which system removes toxins from fetal blood in-utero?
Which system removes toxins from fetal blood in-utero?
What is the functional adult kidney in most fish and amphibians?
What is the functional adult kidney in most fish and amphibians?
What is the main component responsible for forming nephric tubules?
What is the main component responsible for forming nephric tubules?
What is responsible for giving rise to a substantially increased number of nephrons in the metanephros?
What is responsible for giving rise to a substantially increased number of nephrons in the metanephros?
What causes hydronephrosis?
What causes hydronephrosis?
What are the components required for kidney development?
What are the components required for kidney development?
What is responsible for forming the definitive kidney in reptiles, birds, and mammals?
What is responsible for forming the definitive kidney in reptiles, birds, and mammals?
Pronephros is the most advanced of the three excretory organs in mammals.
Pronephros is the most advanced of the three excretory organs in mammals.
The urogenital system includes only the urinary and genital organs.
The urogenital system includes only the urinary and genital organs.
The urogenital ridge forms a nephrogenic cord and a gonadal ridge.
The urogenital ridge forms a nephrogenic cord and a gonadal ridge.
The metanephros is the first generation of kidneys to develop chronologically.
The metanephros is the first generation of kidneys to develop chronologically.
Kidney development involves four phases: pronephros, mesonephros, metanephros, and neonephros.
Kidney development involves four phases: pronephros, mesonephros, metanephros, and neonephros.
The mesonephros becomes the definitive kidney in reptiles, birds, and mammals.
The mesonephros becomes the definitive kidney in reptiles, birds, and mammals.
The definitive kidney in reptiles, birds, and mammals is formed by the mesonephros.
The definitive kidney in reptiles, birds, and mammals is formed by the mesonephros.
The pronephros and mesonephros develop briefly in the cervical region.
The pronephros and mesonephros develop briefly in the cervical region.
The mesonephros eventually degenerates and is replaced by the pronephros.
The mesonephros eventually degenerates and is replaced by the pronephros.
The metanephros consists of a decreased number of nephrons compared to the mesonephros.
The metanephros consists of a decreased number of nephrons compared to the mesonephros.
The metanephros originates from the ureteric bud and the metanephric blastema.
The metanephros originates from the ureteric bud and the metanephric blastema.
Hydronephrosis refers to distension and dilation of the filtration system.
Hydronephrosis refers to distension and dilation of the filtration system.
The collecting system in hydronephrosis is usually obstructed, leading to free flow of urine from the kidney.
The collecting system in hydronephrosis is usually obstructed, leading to free flow of urine from the kidney.
Hydronephrosis can only be acquired and not congenital.
Hydronephrosis can only be acquired and not congenital.
The metanephros gives rise to the definitive urinary collecting system and the nephrons.
The metanephros gives rise to the definitive urinary collecting system and the nephrons.
Nephrons are composed of glomeruli that filter the blood to the Bowman's glomerular capsule.
Nephrons are composed of glomeruli that filter the blood to the Bowman's glomerular capsule.
Metanephric tubule elongates to form the loop of Henle, proximal and distal convoluted tubules, and eventually joins the collecting ducts.
Metanephric tubule elongates to form the loop of Henle, proximal and distal convoluted tubules, and eventually joins the collecting ducts.
Polycystic kidney disease is a genetic disorder resulting in the development of multiple cysts within the kidneys.
Polycystic kidney disease is a genetic disorder resulting in the development of multiple cysts within the kidneys.
The partition of the cloaca forms the urogenital sinus, which connects with the umbilical portion of the allantois and later differentiates into the urinary bladder and the urethra.
The partition of the cloaca forms the urogenital sinus, which connects with the umbilical portion of the allantois and later differentiates into the urinary bladder and the urethra.
The urogenital sinus connects with the allantoic cavity through the urachus, which may persist as a patent urachus, leading to urachal fistula and urachal cysts.
The urogenital sinus connects with the allantoic cavity through the urachus, which may persist as a patent urachus, leading to urachal fistula and urachal cysts.
The urinary bladder and urethra develop from the cranial end of the urogenital sinus and the adjacent region of the urachus, with separate openings for the mesonephric duct and the ureter.
The urinary bladder and urethra develop from the cranial end of the urogenital sinus and the adjacent region of the urachus, with separate openings for the mesonephric duct and the ureter.
Ectopic ureter is a congenital anomaly in which the ureter opens into the urethra or vagina instead of the bladder, causing congenital incontinence.
Ectopic ureter is a congenital anomaly in which the ureter opens into the urethra or vagina instead of the bladder, causing congenital incontinence.
The urethra develops from the urogenital sinus, with gender-specific differences in its development.
The urethra develops from the urogenital sinus, with gender-specific differences in its development.
In males, the mid and caudal regions of the urogenital sinus become the pelvic urethra, which is prolonged by an additional part, the penile urethra, formed inside the penis.
In males, the mid and caudal regions of the urogenital sinus become the pelvic urethra, which is prolonged by an additional part, the penile urethra, formed inside the penis.
The ramification of the collecting system within the nephric blastema causes the kidney to be lobulated initially, with species-specific variations in the fusion of foetal lobes affecting the mature kidney's appearance.
The ramification of the collecting system within the nephric blastema causes the kidney to be lobulated initially, with species-specific variations in the fusion of foetal lobes affecting the mature kidney's appearance.
In females, the midregion of the urogenital sinus becomes the urethra and the caudal region becomes part of the vagina.
In females, the midregion of the urogenital sinus becomes the urethra and the caudal region becomes part of the vagina.
The metanephric mesoderm proliferates to form cellular aggregates, which go through stages to form metanephric tubules, leading to the formation of functional nephrons.
The metanephric mesoderm proliferates to form cellular aggregates, which go through stages to form metanephric tubules, leading to the formation of functional nephrons.
The metanephric tubule expands to form a glomerular capsule and a capillary glomerulus known as the renal corpuscle.
The metanephric tubule expands to form a glomerular capsule and a capillary glomerulus known as the renal corpuscle.
Kidney development involves three generations of kidneys that develop chronologically, in cranial-caudal sequence: ______Â, mesonephros, and metanephros
Kidney development involves three generations of kidneys that develop chronologically, in cranial-caudal sequence: ______Â, mesonephros, and metanephros
The intermediate mesoderm forms a urogenital ridge, consisting of a laterally-positioned nephrogenic cord (it will become the kidneys and ureters) and a medially-positioned gonadal ridge (for gonads and genital tract formation). Because of their common embryological origin, the urinary and genital organs share some common structures and pathways, and together can be referred to as the ______ system
The intermediate mesoderm forms a urogenital ridge, consisting of a laterally-positioned nephrogenic cord (it will become the kidneys and ureters) and a medially-positioned gonadal ridge (for gonads and genital tract formation). Because of their common embryological origin, the urinary and genital organs share some common structures and pathways, and together can be referred to as the ______ system
The pronephros is the most basic of the three excretory organs; it is limited to the embryonic stage of fish and amphibians; in mammals, pronephric structures are vestigial and not functional, except in ______
The pronephros is the most basic of the three excretory organs; it is limited to the embryonic stage of fish and amphibians; in mammals, pronephric structures are vestigial and not functional, except in ______
The metanephros gives rise to the definitive urinary collecting system and the ______
The metanephros gives rise to the definitive urinary collecting system and the ______
Kidney development requires the formation of two components: the filtration system and the ______ system
Kidney development requires the formation of two components: the filtration system and the ______ system
The ______ becomes the functional adult kidney in most fish and amphibians, consisting of an increased number of functional units called mesonephric nephrons
The ______ becomes the functional adult kidney in most fish and amphibians, consisting of an increased number of functional units called mesonephric nephrons
The metanephros consists of a substantially increased number of nephrons, usually from thousands to ______
The metanephros consists of a substantially increased number of nephrons, usually from thousands to ______
The metanephros originates from the ureteric bud and the metanephric blastema, giving rise to the definitive urinary ______ system and the nephrons
The metanephros originates from the ureteric bud and the metanephric blastema, giving rise to the definitive urinary ______ system and the nephrons
Hydronephrosis refers to distension and dilation of the collecting system, usually caused by obstruction of the free flow of ______ from the kidney, and can be acquired or congenital
Hydronephrosis refers to distension and dilation of the collecting system, usually caused by obstruction of the free flow of ______ from the kidney, and can be acquired or congenital
Kidney development involves three phases: pronephros, mesonephros, and ______, with the latter forming the definitive kidney in reptiles, birds, and mammals
Kidney development involves three phases: pronephros, mesonephros, and ______, with the latter forming the definitive kidney in reptiles, birds, and mammals
The pronephros is the most basic of the three generations of renal primordia, developing briefly in the ______ region
The pronephros is the most basic of the three generations of renal primordia, developing briefly in the ______ region
The mesonephros eventually degenerates and is replaced by the metanephros, which develops as the adult kidney in reptiles, birds, and ______
The mesonephros eventually degenerates and is replaced by the metanephros, which develops as the adult kidney in reptiles, birds, and ______
The metanephros originates from the ______ bud and the metanephric blastema, giving rise to the definitive urinary collecting system and the nephrons
The metanephros originates from the ______ bud and the metanephric blastema, giving rise to the definitive urinary collecting system and the nephrons
The mesonephros becomes the functional adult kidney in most fish and amphibians, consisting of an increased number of functional units called ______ nephrons
The mesonephros becomes the functional adult kidney in most fish and amphibians, consisting of an increased number of functional units called ______ nephrons
Metanephric mesoderm proliferates to form cellular aggregates, which go through stages to form metanephric tubules, leading to the formation of functional ______
Metanephric mesoderm proliferates to form cellular aggregates, which go through stages to form metanephric tubules, leading to the formation of functional ______
The metanephric tubule expands to form a glomerular capsule and a capillary glomerulus known as the renal ______
The metanephric tubule expands to form a glomerular capsule and a capillary glomerulus known as the renal ______
The metanephric tubule elongates to form the loop of Henle, proximal and distal convoluted tubules, and eventually joins the collecting ______
The metanephric tubule elongates to form the loop of Henle, proximal and distal convoluted tubules, and eventually joins the collecting ______
Polycystic kidney disease is a genetic disorder resulting in the development of multiple cysts within the ______
Polycystic kidney disease is a genetic disorder resulting in the development of multiple cysts within the ______
The ramification of the collecting system within the nephric blastema causes the kidney to be lobulated initially, with species-specific variations in the fusion of foetal lobes affecting the mature kidney's ______
The ramification of the collecting system within the nephric blastema causes the kidney to be lobulated initially, with species-specific variations in the fusion of foetal lobes affecting the mature kidney's ______
The partition of the cloaca forms the urogenital sinus, which connects with the umbilical portion of the allantois and later differentiates into the urinary bladder and the ______
The partition of the cloaca forms the urogenital sinus, which connects with the umbilical portion of the allantois and later differentiates into the urinary bladder and the ______
The urinary bladder and urethra develop from the cranial end of the urogenital sinus and the adjacent region of the urachus, with separate openings for the mesonephric duct and the ______
The urinary bladder and urethra develop from the cranial end of the urogenital sinus and the adjacent region of the urachus, with separate openings for the mesonephric duct and the ______
Ectopic ureter is a congenital anomaly in which the ureter opens into the urethra or vagina instead of the bladder, causing congenital ______
Ectopic ureter is a congenital anomaly in which the ureter opens into the urethra or vagina instead of the bladder, causing congenital ______
The urethra develops from the urogenital sinus, with gender-specific differences in its ______
The urethra develops from the urogenital sinus, with gender-specific differences in its ______
In females, the midregion of the urogenital sinus becomes the urethra and the caudal region becomes part of the ______
In females, the midregion of the urogenital sinus becomes the urethra and the caudal region becomes part of the ______
In males, the mid and caudal regions of the urogenital sinus become the pelvic urethra, which is prolonged by an additional part, the penile urethra, formed inside the ______
In males, the mid and caudal regions of the urogenital sinus become the pelvic urethra, which is prolonged by an additional part, the penile urethra, formed inside the ______
The partition of the cloaca forms the ______
The partition of the cloaca forms the ______
Study Notes
Development of the Urinary System in Vertebrates
- The urinary and genital systems develop from the intermediate mesoderm, forming the urogenital ridge.
- Kidney development involves three phases: pronephros, mesonephros, and metanephros, with the latter forming the definitive kidney in reptiles, birds, and mammals.
- In-utero, kidneys may not be essential due to the placenta's ability to remove toxins from the fetal blood.
- Kidney development requires the formation of two components: the filtration system and the collecting system.
- Nephrons are composed of glomeruli that filter the blood to the Bowman's glomerular capsule, and the primary urine is conveyed by nephric tubules.
- The pronephros and mesonephros share a similar developmental process, with the mesoderm of the nephrogenic cord undergoing segmentation to form nephric tubules.
- The pronephros is the most basic of the three generations of renal primordia, developing briefly in the cervical region.
- The mesonephros becomes the functional adult kidney in most fish and amphibians, consisting of an increased number of functional units called mesonephric nephrons.
- The mesonephros eventually degenerates and is replaced by the metanephros, which develops as the adult kidney in reptiles, birds, and mammals.
- The metanephros consists of a substantially increased number of nephrons, usually from thousands to millions.
- The metanephros originates from the ureteric bud and the metanephric blastema, giving rise to the definitive urinary collecting system and the nephrons.
- Hydronephrosis refers to distension and dilation of the collecting system, usually caused by obstruction of the free flow of urine from the kidney, and can be acquired or congenital.
Development of the Urinary System in Embryos
- Metanephric mesoderm proliferates to form cellular aggregates, which go through stages to form metanephric tubules, leading to the formation of functional nephrons.
- The metanephric tubule expands to form a glomerular capsule and a capillary glomerulus known as the renal corpuscle.
- The metanephric tubule elongates to form the loop of Henle, proximal and distal convoluted tubules, and eventually joins the collecting ducts.
- Polycystic kidney disease is a genetic disorder resulting in the development of multiple cysts within the kidneys.
- The ramification of the collecting system within the nephric blastema causes the kidney to be lobulated initially, with species-specific variations in the fusion of foetal lobes affecting the mature kidney's appearance.
- The partition of the cloaca forms the urogenital sinus, which connects with the umbilical portion of the allantois and later differentiates into the urinary bladder and the urethra.
- The urogenital sinus connects with the allantoic cavity through the urachus, which may persist as a patent urachus, leading to urachal fistula and urachal cysts.
- The urinary bladder and urethra develop from the cranial end of the urogenital sinus and the adjacent region of the urachus, with separate openings for the mesonephric duct and the ureter.
- Ectopic ureter is a congenital anomaly in which the ureter opens into the urethra or vagina instead of the bladder, causing congenital incontinence.
- The urethra develops from the urogenital sinus, with gender-specific differences in its development.
- In females, the midregion of the urogenital sinus becomes the urethra and the caudal region becomes part of the vagina.
- In males, the mid and caudal regions of the urogenital sinus become the pelvic urethra, which is prolonged by an additional part, the penile urethra, formed inside the penis.
Development of the Urinary System in Embryos
- Metanephric mesoderm proliferates to form cellular aggregates, which go through stages to form metanephric tubules, leading to the formation of functional nephrons.
- The metanephric tubule expands to form a glomerular capsule and a capillary glomerulus known as the renal corpuscle.
- The metanephric tubule elongates to form the loop of Henle, proximal and distal convoluted tubules, and eventually joins the collecting ducts.
- Polycystic kidney disease is a genetic disorder resulting in the development of multiple cysts within the kidneys.
- The ramification of the collecting system within the nephric blastema causes the kidney to be lobulated initially, with species-specific variations in the fusion of foetal lobes affecting the mature kidney's appearance.
- The partition of the cloaca forms the urogenital sinus, which connects with the umbilical portion of the allantois and later differentiates into the urinary bladder and the urethra.
- The urogenital sinus connects with the allantoic cavity through the urachus, which may persist as a patent urachus, leading to urachal fistula and urachal cysts.
- The urinary bladder and urethra develop from the cranial end of the urogenital sinus and the adjacent region of the urachus, with separate openings for the mesonephric duct and the ureter.
- Ectopic ureter is a congenital anomaly in which the ureter opens into the urethra or vagina instead of the bladder, causing congenital incontinence.
- The urethra develops from the urogenital sinus, with gender-specific differences in its development.
- In females, the midregion of the urogenital sinus becomes the urethra and the caudal region becomes part of the vagina.
- In males, the mid and caudal regions of the urogenital sinus become the pelvic urethra, which is prolonged by an additional part, the penile urethra, formed inside the penis.
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Description
Learn about the three stages in kidney development and the origin of structures responsible for urine production and collecting ducts. Explore abnormalities in the development of the urinary system.
