DIGESTION OF ORGANIC COMPOUNDS
WHAT IS DIGESTION?
Digestion
a.
b.
c.
Breakdown ingested food to acquire energy
Chemical Digestion:
Mechanical Digestion:
PROCESS DURING DIGESTION
1.
2.
3.
4.
5.
6.
Ingestion
Secretion
Mixing and propulsion
Digestions: mechanical and chemical
Absorption
Release of Wastes
STRUCTURES USED IN CHEWING
Chewing by teeth
Saliva is mixed w/ food
1.
2.
1.
3.
contains enzyme: salivary amylase
Tongue functions to swallow food
PATH TO STOMACH
1.
2.
Esophagus: muscles move food to stomach
Stomach:
1.
2.
HCL bath
Enzyme: pepsin- breakdown proteins
INTESTINES
1.
Small Intestine: Site of nutrient absorption into
body
a)
b)
c)
2.
Enzymes from the pancreas are added for further
breakdown starch, proteins, fats, and nucleic acid
Maltase, sucrase, lactase break disaccharides
Peptidase breaks dipeptides
Large Intestine: Absorption of water
ORGANS THAT HELP
Pancreas: releases enzymes to SI to break
starches, proteins, fats and nucleic acids
 Liver: secrets bile to break fat, stores glycogen
and fat reserves
