A 2 year old found to have a degenerative malformation of the external oblique aponeurosis during development. Which of the following structures on the anterior abdominal walls is likely defective?

Anatomy

A 2 year old found to have a degenerative malformation of the external oblique aponeurosis during development. Which of the following structures on the anterior abdominal walls is likely defective?

The action of digastric muscle is:

Which of the following vessels supply the anal canal?

All of the following muscles are elevators of the mandible EXCEPT: