1. Slide of 34

2. SMALL INTESTINE (FIGURE 15-9)
Size—about 7 meters (20 feet) long but only 2 cm or so in diameter
Divisions
Duodenum
Jejunum
Ileum

4. SMALL INTESTINE
Wall—contains smooth muscle fibers that contract to produce peristalsis
Lining—mucous membrane; many microscopic glands (intestinal glands) secrete intestinal juice; villi (microscopic finger-shaped projections from surface of mucosa into intestinal cavity) contain blood and lymph capillaries

5. LIVER AND GALLBLADDER
Size and location—liver is largest gland; fills upper right section of abdominal cavity and extends over into left side
Liver secretes bile
Ducts (Figure 15-10)
Hepatic—drains bile from liver
Cystic—duct by which bile enters and leaves gallbladder
Common bile—formed by union of hepatic and cystic ducts; drains bile from hepatic or cystic ducts into duodenum
Gallbladder
Location—undersurface of the liver
Function—concentrates and stores bile produced in the liver

7. PANCREAS Exocrine gland that lies behind stomach Functions
Pancreatic cells secrete pancreatic juice (most important digestive juice) into pancreatic ducts; main duct empties into duodenum
Pancreatic islets (of Langerhans)—cells not connected with pancreatic ducts; secrete hormones glucagon and insulin into the blood

8. LARGE INTESTINE (FIGURE 15-12)
Divisions
Cecum
Colon—ascending, transverse, descending, and sigmoid
Rectum
Food enters through ileocecal valve; external opening called anus
Wall—contains smooth muscle fibers that contract to produce churning, peristalsis, and defecation
Lining—mucous membrane