SMALL INTESTINE

•Villi: Fingerlike projections to increase surface area

• X 600

VILLI

•

SMALL INTESTINE

•Crypts: Glands between villi that produce intestinal juices.

SMALL INTESTINE

•Lacteal: Center of villi, where FAT products get absorbed.

SMALL INTESTINE

•Arteries and Veins: Vessel network in each villi, ABSORB amino acids and glucose.

Veins and Arteries

Digestion & Absorbtion

•3 Big classes (4 with Nucleic acids)

•1. Carbohydrates•2. Proteins•3. Lipids

Carbohydrates

• Start with Starch

STARCH Maltose• AMYLASE

Carbohydrates

•Maltose Glucose• Maltase

Carbohydrates

•Glucose BLOOD

PROTEINS

• Start with Protein

PROTEIN PEPTIDE• Trypsin

Proteins

PEPTIDE Amino Acids

Peptidase

BLOOD

LIPIDS FAT

• Start with fat

FAT FAT DROPLET• BILE

LIPIDS

F. Droplets Fatty Acids

LIPASE Glycerols

LACTEAL (Lymph System)

LARGE INTESTINE

•COLOR CODE THE LARGE INTESTINE

•C, B, D, F, H, I, J, and K

LARGE INTESTINE

Functions:

Only about 5-6 feet

Main function to absorb water

LOTS of bacteria

LARGE INTESTINE

•Cecum: Receive digestive liquid from S.I.

•Compaction begins

LARGE INTESTINE

•Ileocecal Valve:

•One way valve between cecum and ileum.

LARGE INTESTINE

• Appendix: Worm like structure, no function.

• Inflammation???

COLON (4)

•Ascending = goes up

•Transverse = across

•Descending = goes down

•Sigmoid = bending part

LARGE INTESTINE

•Rectum: Collects feces and expels

•Very Muscular

LARGE INTESTINE

•Defecation: Expelling of waste, some conscious control

LARGE INTESTINE

•ANUS: External opening

•Two anal sphincter

•1. Interior = involuntary

•2. Exterior = voluntary

DISORDERS

•Diarrhea: NOT enough water absorbed by the colon.

• As part of the digestion process, or due to fluid intake, food is mixed with large amounts of water. Thus, digested food is essentially liquid prior to reaching the colon. The colon absorbs water, leaving the remaining material as a semisolid stool. If the colon is damaged or inflamed, however, absorption is inhibited, and watery stools result.

DISORDERS

• Constipation: TOO much water absorbed by the large intestine.

Make sure you drink plenty of water and eat more fiber

DISORDERS

•Hemorrhoids: Large veins inflamed in rectum and anus

Hemorrhoids•

•

6 hours

2-7 days

DISORDERS

•Appendicitis: Inflammation of the appendix, HAVE to be removed.

Appendicitis

Appendicitis

DISORDERS

•Colostomy: Remove parts of the colon.

Colostomy

Colostomy

DISORDERS

•Colon Cancer: 2nd Leading cause of cancer death in men and women.

The cells divided when they were not needed and formed an extra mass

of tissue-cancer

• Define colonopticosis

DISORDERS

•Colonopticosis:•Colon = L.I.•Optic = eye, see•Osis = state condition