Question

Arrange intra-abdominal branches of the aorta in bull in the correct sequence.
A. Celiac artery
B. Anterior mesenteric artery
C. Spermatic artery
D. Renal artery
E. 5 pairs of lumbar arteries
Choose the correct answer from the options given below:

• A. A, B, D, C, E
• B. A, B, C, D, E
• C. A, B, D, E, C
• D. A, B, E, D, C

Hint:

The celiac artery (first) and cranial/anterior mesenteric artery (second) are always the most cranial visceral branches of the abdominal aorta. This helps quickly establish the start of the sequence as A $\rightarrow$ B.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
The abdominal aorta runs caudally along the dorsal aspect of the abdominal cavity, giving off consecutive visceral and parietal branches along its course from the diaphragm to the pelvic inlet.

Step 2: Detailed Explanation:
Let us trace the craniocaudal sequence of the abdominal aortic branches in the bull:
1. Celiac artery (A): Arises as the first major visceral branch immediately caudal to the aortic hiatus of the diaphragm (typically at the level of the first lumbar vertebra).
2. Anterior (cranial) mesenteric artery (B): Arises shortly caudal to the celiac artery (also at the level of the first lumbar vertebra).
3. Renal arteries (D): Arise further caudally to supply the kidneys (at the level of the first or second lumbar vertebra).
4. Spermatic (testicular) arteries (C): Arise further caudally from the ventral aspect of the aorta (at the level of the fourth lumbar vertebra) to supply the testes.
5. 5 pairs of lumbar arteries (E): While lumbar arteries arise in pairs dorsally throughout the lumbar segment, the final pairs arise caudally (around L5 and L6) before the terminal division of the aorta.
Therefore, the correct anatomical sequence from cranial to caudal is A, B, D, C, E.

Step 3: Final Answer
The correct option is (A).