The first part of the small intestine is the ____.

A) duodenum
B) ileum
C) colon
D) cecum
E) jejunum

Small Intestine

The part of the gastrointestinal tract between the stomach and large intestine, where most of the digestion and absorption of nutrients takes place.

Duodenum

The first part of the small intestine immediately beyond the stomach, where most chemical digestion takes place.

Jejunum

The mid-section of the small intestine in humans, where most of the digestion and absorption of nutrients occurs.