Animal Nutrition

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Esophagus

Mouth

Crop

Anus

Stomach

Gizzard

Intestine

Slide 28

Esophagus

Mouth

Pharynx

Crop -

storage

Gizzard - mechanical digestion

Typhlosole

Increases surface area

for absorption

Intestine - chemical digestion

Lumen of intestine

Anus

(a) Earthworm

Slide 29

(b) Grasshopper

Foregut

Mouth

Crop

Gastric cecae

Hydrolytic enzymes produced

Esophagus

Rectum

Anus

Midgut

Hindgut

Slide 30

(c) Bird

Stomach

Gizzard

Intestine

Esophagus

Anus

Crop

Mouth

Slide 31

Organs specialized for sequential stages of food processing form the mammalian digestive system

The mammalian digestive system consists of an alimentary canal and accessory glands that secrete digestive juices through ducts.

Mammalian accessory glands are the salivary glands, the pancreas, the liver, and the gallbladder.

Slide 32

Food is pushed along by peristalsis, rhythic contractions of smooth muscles in the wall of the alimentary canal.

Valves called sphincters regulate the movement of material between compartments.

Slide 33

human digestive system

Cecum

Anus

Anus

Ascending portion of large intestine

Gall- bladder

Small intestine

Large intestine

Small intestine

Rectum

Pancreas

Liver

Salivary glands

Tongue

Oral cavity

Pharynx

Esophagus

Sphincter

Stomach

pyloric

sphincter

Duodenum of small intestine

Appendix

Liver

Pancreas

Small intestine

Large intestine

Rectum

Stomach

Gall- bladder

A schematic diagram of the human digestive system

Esophagus

Salivary glands

Mouth

Slide 34

Cecum

Anus

Ascending portion of large intestine

Gall- bladder

Small intestine

Large intestine

Small intestine

Rectum

Pancreas

Liver

Salivary glands

Tongue

Oral cavity

Pharynx

Esophagus

Sphincter

Stomach

pyloric

sphincter

Duodenum of small intestine

Appendix

Slide 35

A Schematic Diagram of the Human Digestive System

Anus

Liver

Pancreas

Small intestine

Large intestine