A contrast study of the pulmonary vessels reveals several pulmonary veins entering the left atrium. How many pulmonary veins entering the left atrium is most likely be seen?

Anatomy

A contrast study of the pulmonary vessels reveals several pulmonary veins entering the left atrium. How many pulmonary veins entering the left atrium is most likely be seen?

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: