Human Anatomy - Urogenital System Lecture 9

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Questions and Answers

What is the function of the urethra?

To store sperm

To transport urine to the exterior of the body (correct)

To produce urine

To regulate body temperature

What is the length of the male urethra?

25-30 cm

18-20 cm (correct)

30-35 cm

10-12 cm

What is the function of the internal urethral sphincter?

To regulate body temperature

To involuntarily control urination (correct)

To voluntarily control urination

To produce sperm

What is urinary incontinence?

The inability to control urination voluntarily Signup and view all the answers

What is the main function of the gonads?

To produce gametes and secrete hormones Signup and view all the answers

What is the function of the epididymis?

To store and protect sperm and facilitate their functional maturation Signup and view all the answers

Why are the testes kept at a lower temperature than the core body temperature?

To facilitate sperm production Signup and view all the answers

What is the length of the vas deferens?

40-45 cm Signup and view all the answers

What is the primary function of the kidneys in the urinary system?

To filter blood and maintain fluid balance Signup and view all the answers

What is the structure that passes through the hilum of the kidney?

Renal artery, vein, and ureter Signup and view all the answers

What is the length of each ureter?

25cm Signup and view all the answers

What is the function of the ureters in the urinary system?

To transport urine from the kidneys to the urinary bladder Signup and view all the answers

What is the location of the kidneys in the abdominal cavity?

Posterior part Signup and view all the answers

What is the structure that connects the ureters to the urinary bladder?

Intramural oblique course Signup and view all the answers

What is the function of the urinary bladder in the urinary system?

To store and eliminate urine Signup and view all the answers

What is the relationship between the upper pole of the kidney and the adrenal gland?

The adrenal gland is related to the upper pole of the kidney Signup and view all the answers

What is the function of the vas deferens in the male reproductive system?

Peristaltic contractions to propel semen through the duct Signup and view all the answers

Where are the seminal vesicles located in the male reproductive system?

Behind the base of the urinary bladder Signup and view all the answers

What is the function of the prostate gland in the male reproductive system?

Activation of sperm and nutrition of sperm Signup and view all the answers

What is the result of prostatic hyperplasia in an aging male?

Trouble starting urination, weak stream, inability to urinate Signup and view all the answers

What is the function of the ovaries in the female reproductive system?

Production of female gametes and secretion of female sex hormones Signup and view all the answers

Where does fertilization occur in the female reproductive system?

In the ampulla of the uterine tube Signup and view all the answers

What is the cervix in the female reproductive system?

The inferior portion of the uterus and protrudes into the vagina Signup and view all the answers

What is the relationship between the vagina and the urethra in the female reproductive system?

The vagina is related anteriorly to the urethra Signup and view all the answers

Study Notes

Urogenital System

The genitourinary system consists of the reproductive system and the urinary system.

Urinary System

Consists of:
- Two kidneys
- Two ureters
- Urinary bladder
- Urethra
Kidneys:
- Two bean-shaped organs in the posterior part of the abdominal cavity
- Help the body pass waste as urine
- Functions:
  - Maintain fluid balance
  - Filter blood
  - Create hormones that help produce red blood cells
- Each kidney has:
  - Two poles (upper and lower)
  - Two borders (medial and lateral)
  - Upper pole is related to the adrenal gland
  - Medial border has the hilum of the kidney
Ureters:
- A pair of muscular tubes that extend from the kidneys to the urinary bladder
- Each ureter begins at the funnel-shaped renal pelvis
- Length: about 25cm
- Function: transportation of urine from the kidneys to the urinary bladder
- Penetrate the posterolateral angle of the urinary bladder by slit-like opening (intramural oblique course)
Urinary Bladder:
- A muscular sac that contracts and empties urine through the urethra
- Has:
  - Apex: anterior
  - Base: posterior (ureters enter at superolateral angles)
  - Neck: inferior end (exit of urethra and in males lies on the prostate)
Urethra:
- Function: transports urine to the exterior of the body
- Length:
  - Male urethra: 18-20 cm
  - Female urethra: about 4 cm
- Sphincters:
  - Internal urethral sphincter at the bladder neck (involuntary)
  - External urethral sphincter (voluntary)

Male Reproductive System

Consists of:
- Gonads (Testes)
- Ducts
- Accessory glands
- External genitalia
Testes:
- Hang within the scrotum (protection from body temperature)
- Function:
  - Secrete testosterone (male sex hormone)
  - Produce sperms (male gametes) at a rate of ½ billion/day
Epididymis:
- A coiled tube (7 m) in length
- Function: stores and protects sperms and facilitates their functional maturation
- Tail of the epididymis is continuous with the vas deferens
Vas deferens:
- A muscular tube (40–45 cm long)
- Function: peristaltic contractions propel semen through the duct
Accessory glands:
- Prostate (below the neck of the urinary bladder)
- Seminal vesicle (behind the base of the urinary bladder)
- Function:
  - Activation of sperm
  - Nutrition of sperm
  - Provide a fluid media for sperm propulsion

Female Reproductive System

Consists of:
- Gonads (Ovaries)
- Ducts
- Accessory glands
- External genitalia
Ovaries:
- Paired organs
- Location: in the lateral pelvic wall
- Function:
  - Produce female gametes, ovum (one per month)
  - Secrete female sex hormones, estrogens and progesterone
Uterine Tubes (Fallopian tubes):
- Extend from the superolateral angles of the uterus to the ovaries
- Site of fertilization (ampulla)
- Function: transport the fertilized ovum towards the uterus
Uterus:
- Pear-shaped organ
- Divided into:
  - Body (largest portion)
  - Fundus (portion superior to the attachment of the uterine tubes)
  - Cervix (inferior portion)
Vagina:
- Elastic, highly distensible, muscular tube
- Extends between the cervix and the exterior
- Related anteriorly to the urethra and posteriorly to the rectum and anal canal

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Description

Identify and describe the organs and structures of the urinary and reproductive systems, including the kidneys, ureters, bladder, urethra, and male and female reproductive systems.