New Jersey Anatomy Quiz: Jejunum and Ileum

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Questions and Answers

What anatomical feature distinguishes the jejunum from the ileum in terms of vascular supply?

Fewer lymphatic vessels

Less prominent arcades

Greater vascular supply (correct)

Longer vasa recta (correct)

Which of the following correctly describes the arcades in the jejunum compared to the ileum?

Fewer and more flattened arcades in the jejunum

Less vascularized arcades in the jejunum

More prominent and layered arcades in the jejunum (correct)

Similar arcade structures in both sections

What is a characteristic feature of the ileum regarding its vascular structure?

Increased lymphatic drainage

Shorter vasa recta (correct)

More complex arcade configurations

Greater vascular density

In comparing the jejunum and ileum, which statement is true regarding their overall appearance?

The jejunum has a thicker wall compared to the ileum Signup and view all the answers

What can be inferred about the vascular supply to the jejunum as compared to the ileum?

The jejunum has a more extensive capillary network Signup and view all the answers

Which statement best differentiates the sma branches supplying the jejunum from those supplying the ileum?

Jejunal branches are longer and fewer Signup and view all the answers

Which artery arises from the abdominal aorta at the level of T12/L1?

Celiac trunk Signup and view all the answers

Which statement about the splenic artery is true?

It has a classic tortuous appearance along the pancreas. Signup and view all the answers

What anatomical structure does the common hepatic artery travel through?

Hepatoduodenal ligament Signup and view all the answers

Which artery primarily supplies the stomach and abdominal esophagus?

Left gastric artery Signup and view all the answers

What is the anatomical origin of the inferior mesenteric artery?

From the abdominal aorta at L4 Signup and view all the answers

The celiac trunk is responsible for supplying which of the following organs?

Stomach, duodenum, pancreas, liver, gallbladder Signup and view all the answers

Which part of the digestive system does the inferior mesenteric artery primarily supply?

Colon and rectum Signup and view all the answers

Which of the following ligaments does the splenic artery travel along with?

Splenorenal ligament and greater omental ligaments Signup and view all the answers

Which artery does the inferior mesenteric artery anastomose with?

Superior mesenteric artery Signup and view all the answers

What is the terminal branch of the inferior mesenteric artery?

Superior rectal artery Signup and view all the answers

Which of the following arteries is involved in anastomosis with the inferior mesenteric artery?

Middle colic artery of the superior mesenteric artery Signup and view all the answers

Which level of the vertebral column does the inferior mesenteric artery arise?

L4 Signup and view all the answers

The inferior mesenteric artery passes inferiorly to which part of the digestive system?

Third part of the duodenum Signup and view all the answers

What type of blood supply is primarily provided by the inferior mesenteric artery?

Lower gastrointestinal blood supply Signup and view all the answers

Which of the following describes a major branch of the abdominal aorta?

Celiac trunk Signup and view all the answers

What is the significance of portosystemic anastomoses?

They enable drainage from the abdominal viscera into systemic circulation. Signup and view all the answers

Which of the following statements about paired and unpaired abdominal viscera is correct?

Unpaired viscera are supplied by branches of the abdominal aorta. Signup and view all the answers

Which of the following describes the autonomic innervation to the abdominal viscera?

It combines both sympathetic and parasympathetic fibers from different spinal regions. Signup and view all the answers

Which of the following veins is primarily responsible for draining the abdominal viscera?

Portal vein Signup and view all the answers

Which of the following lymphatic pathways is typically involved in draining abdominal viscera?

Cisterna chyli to thoracic duct Signup and view all the answers

What anatomical feature is unique to the pathway of arteries to abdominal viscera?

Arteries have predictable branching patterns. Signup and view all the answers

Which of the following describes a primary characteristic of secondary retroperitoneal organs?

They originally develop intraperitoneally before moving to the retroperitoneum. Signup and view all the answers

Which of the following is NOT a major branch of the abdominal aorta?

Inferior gastric artery Signup and view all the answers

Which type of viscera typically receive dual blood supply?

Paired visceral organs like the kidneys Signup and view all the answers

Study Notes

Arterial Supply in the Abdominal Region

Jejunum has longer vasa recta and a greater vascular supply compared to the ileum, which has more prominent/layered arcades and shorter vasa recta.
The Inferior Mesenteric Artery (IMA) arises at the L4 level from the abdominal aorta and passes inferiorly to the third part of the duodenum.
IMA anastomoses with the Superior Mesenteric Artery (SMA) via the left colic artery connecting to the middle colic artery.
The terminal branch of the IMA is the superior rectal artery.

Celiac Trunk and Branches

The celiac trunk arises at the T12/L1 level from the abdominal aorta, supplying several major organs.
Splenic artery, characterized by a tortuous path, supplies the pancreas, stomach, and spleen. It has branches that travel within the splenorenal and greater omental ligaments.
Common hepatic artery supplies the liver, stomach, duodenum, pancreas, and gall bladder; travels within the hepatoduodenal ligament.
Left gastric artery, a smaller branch, supplies the stomach and abdominal esophagus and travels within the gastrohepatic ligament.

Portosystemic Anastomoses

Portal and systemic veins can form potential anastomoses at key points:
- Oesophagus: Left gastric vein connects to the azygous vein.
- Umbilicus/Anterior abdominal wall: Paraumbilical vein connects to epigastric veins.
- Secondarily retroperitoneal viscera and liver: Relationships exist with the left colic artery draining into lumbar veins.
- Rectum: Superior rectal vein connects with middle and inferior rectal veins.

Learning Outcomes

Compare and contrast the origins of arterial supply for unpaired (e.g., IMA, SMA, celiac trunk) versus paired abdominal viscera (e.g., renal arteries).
Identify major unpaired branches of the abdominal aorta and their branches to the viscera.
Describe artery pathways considering their anatomical relationships with viscera and peritoneum.
Understand major venous drainage routes via the portal system and its significance.
Recognize potential portosystemic anastomoses and their clinical importance.
Describe autonomic innervation of the abdominal viscera and basic lymphatic drainage mechanisms.

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Description

Test your knowledge on the anatomy of the jejunum and ileum with this quiz. Explore the structures such as arcades and vasa recta, and their significance in the digestive system. Perfect for students studying human anatomy or related fields.