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Questions and Answers
Which of the following correctly describes the boundaries of the abdominal cavity?
Which of the following correctly describes the boundaries of the abdominal cavity?
- Abdominal walls, rib cage, and diaphragm.
- Abdominal walls, diaphragm, and pelvis. (correct)
- Abdominal walls, rib cage, and pelvis.
- Abdominal walls, diaphragm, and ilium.
The majority of which system's organs are found within the abdominal cavity?
The majority of which system's organs are found within the abdominal cavity?
- Respiratory system
- Urinary system
- Digestive system (correct)
- Cardiovascular system
In which abdominal quadrant would the majority of the stomach be located?
In which abdominal quadrant would the majority of the stomach be located?
- Right Upper Quadrant
- Left Lower Quadrant
- Right Lower Quadrant
- Left Upper Quadrant (correct)
Which of the following organs is located in the right lower quadrant of the abdomen?
Which of the following organs is located in the right lower quadrant of the abdomen?
Which of the following regions is located superior to the umbilical region of the abdomen?
Which of the following regions is located superior to the umbilical region of the abdomen?
What is the function of the mesentery?
What is the function of the mesentery?
What is the peritoneal cavity best described as?
What is the peritoneal cavity best described as?
What is a key difference between the peritoneal cavity in males compared to females?
What is a key difference between the peritoneal cavity in males compared to females?
Which of the following best describes a retroperitoneal organ?
Which of the following best describes a retroperitoneal organ?
The liver is connected to the anterior abdominal wall by which ligament?
The liver is connected to the anterior abdominal wall by which ligament?
Which of these organs is NOT considered intraperitoneal?
Which of these organs is NOT considered intraperitoneal?
Which structure is a remnant of the umbilical vein?
Which structure is a remnant of the umbilical vein?
The hepatic portal vein is formed by the union of which two veins?
The hepatic portal vein is formed by the union of which two veins?
Which of the following is a function of the liver?
Which of the following is a function of the liver?
The bare area of the liver is characterized by:
The bare area of the liver is characterized by:
Which parts of the digestive system are retroperitoneal?
Which parts of the digestive system are retroperitoneal?
Which vascular system bypasses hepatic filtration?
Which vascular system bypasses hepatic filtration?
The majority of blood flow to the liver comes from the:
The majority of blood flow to the liver comes from the:
Which vessels form a portal-caval anastomosis that can result in caput medusae?
Which vessels form a portal-caval anastomosis that can result in caput medusae?
The common bile duct is formed by the union of which two ducts?
The common bile duct is formed by the union of which two ducts?
Which of the following structures is NOT found within the portal triad?
Which of the following structures is NOT found within the portal triad?
What is the primary function of the rugae in the stomach?
What is the primary function of the rugae in the stomach?
The hepatogastric ligament is a part of which larger structure?
The hepatogastric ligament is a part of which larger structure?
Where does the hepatopancreatic ampulla open into the digestive system?
Where does the hepatopancreatic ampulla open into the digestive system?
Which part of the stomach is directly adjacent to the esophagus?
Which part of the stomach is directly adjacent to the esophagus?
The pyloric sphincter is responsible for:
The pyloric sphincter is responsible for:
Which segment of the small intestine is primarily located in the right lower quadrant?
Which segment of the small intestine is primarily located in the right lower quadrant?
The thickened free edge of the lesser omentum, that conducts the portal triad, is the:
The thickened free edge of the lesser omentum, that conducts the portal triad, is the:
Where do the presynaptic neurons of the sympathetic nervous system originate?
Where do the presynaptic neurons of the sympathetic nervous system originate?
Which type of ganglia contains postganglionic neurons that innervate the abdominal viscera?
Which type of ganglia contains postganglionic neurons that innervate the abdominal viscera?
Which of the following is NOT a prevertebral ganglion?
Which of the following is NOT a prevertebral ganglion?
What is the role of the abdominopelvic splanchnic nerves?
What is the role of the abdominopelvic splanchnic nerves?
Where do the presynaptic sympathetic fibers of the abdominopelvic splanchnic nerves synapse?
Where do the presynaptic sympathetic fibers of the abdominopelvic splanchnic nerves synapse?
Which of the following is a thoracic splanchnic nerve?
Which of the following is a thoracic splanchnic nerve?
The greater splanchnic nerve originates at which spinal cord levels?
The greater splanchnic nerve originates at which spinal cord levels?
Where do postganglionic fibers of the lesser splanchnic nerve distribute to?
Where do postganglionic fibers of the lesser splanchnic nerve distribute to?
Which of the following is a characteristic of the ileum?
Which of the following is a characteristic of the ileum?
The mesentery proper attaches which organs to the posterior abdominal wall?
The mesentery proper attaches which organs to the posterior abdominal wall?
Which structure is a projection from the inferior part of the head of the pancreas?
Which structure is a projection from the inferior part of the head of the pancreas?
The main pancreatic duct merges with the common bile duct to form which structure?
The main pancreatic duct merges with the common bile duct to form which structure?
Which of the following is NOT a characteristic of the large intestine?
Which of the following is NOT a characteristic of the large intestine?
The kidneys are located at approximately which vertebral levels?
The kidneys are located at approximately which vertebral levels?
What is the most external layer of the kidney?
What is the most external layer of the kidney?
Which of the following structures is NOT found within the kidney?
Which of the following structures is NOT found within the kidney?
Which artery supplies the foregut?
Which artery supplies the foregut?
Which artery is NOT a direct branch of the celiac trunk?
Which artery is NOT a direct branch of the celiac trunk?
Which arteries are part of the superior mesenteric artery branch?
Which arteries are part of the superior mesenteric artery branch?
The 'Marginal artery of Drummond' provides an anastomotic connection between which two arteries?
The 'Marginal artery of Drummond' provides an anastomotic connection between which two arteries?
Which of these is part of the sympathetic nervous system's effect on the GI tract?
Which of these is part of the sympathetic nervous system's effect on the GI tract?
Which nerve fibers are carried by the splanchnic nerves?
Which nerve fibers are carried by the splanchnic nerves?
The lumbar splanchnic nerves originate from which spinal cord levels?
The lumbar splanchnic nerves originate from which spinal cord levels?
Which plexus innervates the hindgut and pelvic viscera?
Which plexus innervates the hindgut and pelvic viscera?
Which cranial nerve provides parasympathetic innervation to the thoracic viscera?
Which cranial nerve provides parasympathetic innervation to the thoracic viscera?
Where are the postganglionic cell bodies of the parasympathetic nervous system typically located?
Where are the postganglionic cell bodies of the parasympathetic nervous system typically located?
The foregut and midgut receive parasympathetic innervation from which nerve?
The foregut and midgut receive parasympathetic innervation from which nerve?
Which of the following is NOT a head ganglia of the parasympathetic nervous system?
Which of the following is NOT a head ganglia of the parasympathetic nervous system?
What is the primary destination for the presynaptic fibers of the pelvic splanchnic nerves?
What is the primary destination for the presynaptic fibers of the pelvic splanchnic nerves?
The sacral outflow of the parasympathetic nervous system involves which spinal cord levels?
The sacral outflow of the parasympathetic nervous system involves which spinal cord levels?
Where do the presynaptic fibers of the vagus nerve synapse?
Where do the presynaptic fibers of the vagus nerve synapse?
Postganglionic fibers from the lumbar splanchnic nerves follow what to reach the hindgut structures?
Postganglionic fibers from the lumbar splanchnic nerves follow what to reach the hindgut structures?
Which of the following describes the location of the presynaptic cell bodies of the pelvic splanchnic nerves ?
Which of the following describes the location of the presynaptic cell bodies of the pelvic splanchnic nerves ?
Flashcards
What are the boundaries of the abdominal cavity?
What are the boundaries of the abdominal cavity?
Consists of the abdomen, diaphragm, and pelvis.
What is the abdominopelvic cavity?
What is the abdominopelvic cavity?
Largest portion of the abdominopelvic cavity, which also includes the pelvis.
How many quadrants are there in the abdominal cavity?
How many quadrants are there in the abdominal cavity?
The body is divided into four sections by a vertical and horizontal line intersecting at the belly button.
What is the parietal peritoneum?
What is the parietal peritoneum?
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What is the visceral peritoneum?
What is the visceral peritoneum?
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What is the peritoneal cavity?
What is the peritoneal cavity?
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What is the mesentery?
What is the mesentery?
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What are peritoneal ligaments?
What are peritoneal ligaments?
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Portal-Caval Anatomoses
Portal-Caval Anatomoses
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Common Bile Duct
Common Bile Duct
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Hepatopancreatic Ampulla (Ampulla of Vater)
Hepatopancreatic Ampulla (Ampulla of Vater)
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Portal Triad
Portal Triad
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Stomach
Stomach
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Cardia
Cardia
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Fundus
Fundus
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Rugae
Rugae
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Cardiac (lower esophageal) Sphincter
Cardiac (lower esophageal) Sphincter
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Pyloric Sphincter
Pyloric Sphincter
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What are retroperitoneal organs?
What are retroperitoneal organs?
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What are intraperitoneal organs?
What are intraperitoneal organs?
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Name some intraperitoneal organs.
Name some intraperitoneal organs.
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Name some retroperitoneal organs.
Name some retroperitoneal organs.
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What organs are part of the digestive system
What organs are part of the digestive system
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What are the main functions of the liver?
What are the main functions of the liver?
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How is the liver structurally divided?
How is the liver structurally divided?
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What is the bare area of the liver?
What is the bare area of the liver?
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What is the hepatic portal vein?
What is the hepatic portal vein?
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What is the portal venous system and how does it function?
What is the portal venous system and how does it function?
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Sympathetic Ganglia
Sympathetic Ganglia
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Paravertebral Ganglia
Paravertebral Ganglia
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Prevertebral Ganglia
Prevertebral Ganglia
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Sympathetic Nervous System
Sympathetic Nervous System
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Abdominopelvic Splanchnic Nerves
Abdominopelvic Splanchnic Nerves
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Celiac Ganglion
Celiac Ganglion
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Greater Splanchnic Nerve
Greater Splanchnic Nerve
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Lesser Splanchnic Nerve
Lesser Splanchnic Nerve
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Aorticorenal Ganglia
Aorticorenal Ganglia
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Periarterial Plexuses
Periarterial Plexuses
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Inferior Mesenteric Ganglion
Inferior Mesenteric Ganglion
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Parasympathetic Nervous System
Parasympathetic Nervous System
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Presynaptic Neuron
Presynaptic Neuron
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Postsynaptic Neuron
Postsynaptic Neuron
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Head Ganglia
Head Ganglia
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Terminal or Intramural Ganglia
Terminal or Intramural Ganglia
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Parasympathetic Innervation of the Abdomen
Parasympathetic Innervation of the Abdomen
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Mesentery Proper
Mesentery Proper
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Pancreas
Pancreas
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Uncinate Process
Uncinate Process
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Main Pancreatic Duct
Main Pancreatic Duct
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Hepatopancreatic Ampulla
Hepatopancreatic Ampulla
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Large Intestine
Large Intestine
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Omental (Epiploic) Appendices
Omental (Epiploic) Appendices
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Teniae Coli
Teniae Coli
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Haustra
Haustra
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Kidneys
Kidneys
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Cortex
Cortex
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Medulla
Medulla
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Celiac Trunk
Celiac Trunk
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Superior Mesenteric Artery
Superior Mesenteric Artery
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Inferior Mesenteric Artery
Inferior Mesenteric Artery
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Study Notes
Abdominal Cavity Organs
- The abdominal cavity is bordered by abdominal walls, diaphragm, and pelvis
- It forms the major portion of the abdominopelvic cavity, which is continuous with pelvic cavities
- It contains most digestive organs, spleen, kidneys, and ureters.
Outline
- The organs of the abdominal cavity
- Blood supply
- Innervation
Digestive Tract
- The abdominal viscera comprises the majority of the digestive tract
- Viscera include the esophagus, stomach, small intestine, large intestine, liver, gallbladder, pancreas, etc.
Abdominal Quadrants
- The abdomen is divided into four quadrants by imaginary horizontal and vertical lines that intersect at the umbilicus
- The quadrants are right upper quadrant (RUQ), left upper quadrant (LUQ), right lower quadrant (RLQ), and left lower quadrant (LLQ)
Abdominal Regions
- The abdomen is also divided into nine regions
- These include the epigastric, right hypochondriac, left hypochondriac, umbilical, right lumbar, left lumbar, hypogastric/suprapubic, right iliac/inguinal, and left iliac/inguinal regions.
Peritoneum
- Peritoneum is a mesothelial membrane that lines the abdominopelvic cavity
- Parietal peritoneum: lines the inner walls of the cavity
- Visceral peritoneum: covers the abdominal organs
- Peritoneal cavity: potential space between parietal and visceral peritoneum, containing a small amount of peritoneal fluid (~50mL)
- In males, the peritoneal cavity is closed, but females have an opening for oocytes to pass from the ovaries to the fallopian tube.
Mesenteries and Peritoneal Ligaments
- Mesentery is a double layer of peritoneum that encloses an organ and connects it to the posterior abdominal wall
- Peritoneal ligaments connect one organ to another, or to the abdominal wall
- These provide pathways for nerves, vessels, and lymphatics
Intraperitoneal vs. Retroperitoneal Organs
- Retroperitoneal organs: only partially covered by peritoneum (kidneys, duodenum, etc.)
- Intraperitoneal organs: completely covered by peritoneum (stomach, liver, etc.)
Liver
- Detoxification
- Glycogen storage
- Hormone production
- Plasma protein synthesis
- Bile production
- Four anatomical lobes (right, left, quadrate, caudate)
- Divided into 8 functionally surgically-resectable segments
Hepatic Portal Vein
- Brings 75-80% of the blood to the liver from the gastrointestinal tract
- Carries nutrients absorbed by the gastrointestinal tract
- Formed by the union of the superior mesenteric vein and the splenic vein
- Divides into right and left branches
Portal Venous System
- Transports blood from gastrointestinal viscera to the liver for filtration
- Formed by the union of superior mesenteric vein and splenic vein.
- Inferior mesenteric vein typically drains into the splenic vein
Caval Venous System
- Drains venous blood from structures of the posterior abdominal wall, kidneys, suprarenal glands.
- Blood bypasses liver
- For the heart's right atrium
Portal-Caval Anastomoses
- Anastomoses provide collateral circulation if obstruction occurs in the liver or portal vein
- Include structures like esophageal veins, superior rectal veins, paraumbilical and colic veins.
Stomach
- Stores and prepares food for digestion through chemical and mechanical processes
- Four regions: cardia, fundus, body, pylorus
- Has rugae-folds that disappear during dilation
- Contains sphincters- cardiac and pyloric
- Stomach has ligaments: Greater Omentum, Gastrosplenic ligament, Gastrophrenic ligament, Gastrocolic ligament
Small Intestine
- Duodenum (~1ft.), C-shaped
- Jejunum (~8 ft.)
- Ileum (~12ft.)
- Primary site for nutrient absorption
Duodenum
- Part of the small intestine
- Four parts: Superior, Descending, Inferior, Ascending
Jejunum & Ileum
- Most of the jejunum is located in the left upper quadrant.
- Most of the ileum is located in the right lower quadrant.
Large Intestine
- Absorbs water and electrolytes, produces and absorbs vitamins, and propels feces towards the rectum
- Parts:
- Cecum (with Appendix)
- Ascending colon
- Transverse colon
- Descending colon
- Sigmoid colon
- Rectum
Pancreas
- Accessory digestive gland
- Located posterior to the stomach between the duodenum and the spleen
- Produces enzymes for digestion (exocrine secretions)
- Produces hormones such as glucagon and insulin (endocrine secretions)
- Regions: head, neck, body, tail
Kidney
- Remove excess water, salts, and wastes from the blood
- Return nutrients and chemicals
- Lie retroperitoneally on the posterior abdominal wall
- On either side of the vertebral column at levels of T12 to L3
- Left kidney slightly superior than right
Blood Supply - Foregut, Midgut, Hindgut
- Organs have three major blood supply segments related to their development stages.
- Esophagus, stomach, liver, gallbladder, pancreas: supplied by the Celiac Trunk.
- Parts of duodenum, jejunum, ileum, cecum, appendix: supplied by the Superior Mesenteric Artery (SMA).
- Colon's distal portion, sigmoid colon, rectum: supplied by the Inferior Mesenteric Artery (IMA).
Blood Supply - Specific Arteries
- Celiac Trunk: Left Gastric Artery, Splenic Artery, Common Hepatic Artery
- Superior Mesenteric Artery: lleocolic artery, Right colic artery, Middle colic artery, Intestinal arteries
- Inferior Mesenteric Artery: Left colic artery, Sigmoid arteries, Superior rectal artery
Innervation - Sympathetic
- Inhibits peristalsis
- Contracts internal anal sphincter to aid fecal continence
- Promotes breakdown of glycogen
Innervation - Parasympathetic
- Prompts peristalsis
- Stimulates secretion of digestive juices
- Relaxes internal anal sphincter
Autonomic Plexuses
- Contain sympathetic & parasympathetic efferents and visceral afferents
- Innervate visceral components
- Include Cardiac, Pulmonary, Esophogeal, Abdominal & Pelvic plexuses
Splanchnic Nerves
- Carry both visceral efferent & afferent fibers
- Important for sympathetic control of abdominal viscera
- Consist of: Cardiopulmonary, Abdominopelvic, Greater, Lesser, Least, Lumbar and Sacral splanchnic nerves.
Parasympathetic Nervous System
- Cranial outflow from brainstem (CN III, VII, IX, X), innervating head, thorax, and abdomen
- Sacral outflow from S2-S4 spinal cord, innervating the hindgut and pelvic viscera
- Terminal or intramural ganglia near target organs
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Description
Test your knowledge about the anatomy of the abdominal cavity and its contents. This quiz covers questions about organ locations, boundaries, and functions within the abdominal region. Perfect for students studying anatomy or related subjects.