Anatomy and Physiology Chapter 39: Lower Digestive Tract with Complete Questions and Answer with Detailed Rationales Already Graded A+ | 2026/2027 updated

Anatomy and Physiology Chapter 39: Lower Digestive
Tract with Complete Questions and Answer with
Detailed Rationales Already Graded A+ | 2026/2027
updated


small intestine - ANSWER✔✨-body's major digestive organ, extends from pyloric sphincter to
large intestine

- longest section of alimentary tube 8-20 feet long



small intestine - ANSWER✔✨-where does digestion of food begin and where nearly all food
absorption occurs



- duodenum

- pancreatic ducts

- sphincter - ANSWER✔✨-the small intestine has 3 subdivisions...what are they



bile duct - ANSWER✔✨-bile from livers enters through ______



pancreatic duct - ANSWER✔✨-enzymes produces by pancreas ducted into duodenum via
_________



duodenum - ANSWER✔✨-5% of the length about 10 inches



jejunum - ANSWER✔✨-40% of the length about 8 ft

, Ileum and ileocecal valve - ANSWER✔✨-60% of the length, meets large intestine at the
____________



ileocecal valve - ANSWER✔✨-about 12 ft



Villi - ANSWER✔✨-modification of the mucosal layer; each contains an arteriole venule, and
lymph vessel



Microvilli - ANSWER✔✨-tiny projections of plasma membrane of mucosa cells



circular folds - ANSWER✔✨-deep folds of mucosa and submucosa layers



large intestine - ANSWER✔✨-approximately 5 feet long, extends from iliocecal valve to anus



dry out indigestible food by absorbing water and eliminate waste as feces - ANSWER✔✨-what
is the function of the large intestine



1. cecum

2. colon

- ascending colon

-traverse colon

-descending colon

-sigmoid colon

3. rectum - ANSWER✔✨-What are the 3 subdivisions of the large intestine