Anatomy Flashcards

Which structure forms the posterior boundary of the epiploic foramen (foramen of Winslow)?

Answer: Inferior vena cava

The inferior vena cava forms the posterior boundary of the epiploic foramen, allowing access to the lesser sac.

Wrist drop results from injury to which nerve?

Answer: Radial nerve

Radial nerve injury causes wrist drop due to loss of innervation to the wrist and finger extensors.

The moderator band (septomarginal trabecula) is found in which cardiac chamber and carries which structure?

Answer: Right ventricle; right bundle branch

The moderator band crosses the right ventricle and carries the right bundle branch of the cardiac conduction system.

The thoracic duct begins at the cisterna chyli and drains into which venous junction?

Answer: Left subclavian and left internal jugular junction

The thoracic duct empties into the left venous angle (junction of left subclavian and left internal jugular veins).

The dentate (pectinate) line in the anal canal marks a transition between which two types of epithelium?

Answer: Simple columnar to stratified squamous

Above the dentate line the mucosa is simple columnar epithelium; below it transitions to non-keratinized stratified squamous epithelium.

Which muscle is the primary medial rotator and adductor of the arm?

Answer: Subscapularis

The subscapularis is the largest rotator cuff muscle and the primary medial rotator of the humerus; it also adducts the arm.

The appendix most commonly arises from the cecum at which taenia coli convergence point?

Answer: Convergence of all three taeniae coli

The three taeniae coli converge at the base of the appendix, making this anatomical landmark useful for locating the appendix surgically.