Final Exam Chp. 12 Study Guide [211581]

Identify esophagus, upper and lower esophageal sphincters, stomach, duodenum, liver, gall bladder, pancreas, small intestine, and large intestine. - - -Compare and contrast the digestive systems in shark vs. fetal pig. - -Both have small intestines Shark has spiral valves that increase surface area and fetal have highly folded s.i. -How do shark and fetal pig maximize the efficiency of nutrient absorption respectively? - -Shark: spiral valves Fetal pig: have highly folded small intestine -Know the histological characteristics of esophagus, stomach and intestine. - -Adventita: outer layer composed of connective tissue, anchors organs in place Muscularis: muscles, help push food along Submucosa: contains blood + lymphatic vessels, Nerves Mucosa: innermost layer, most contact in food, secretes mucus -