Four stages of digestion Flashcards
(12 cards)
What are the 4 stages of digestion
ingestion
digestion
absorption
egestion
Digestion def
the process of breaking down food that can be absorbed into the blood and carried to the body cells
Physical digestion
the pulling apart of large food into smaller particles.
ex: teeth
Chemical digestion
use of enzymes capable of breaking bonds in large molecules
ex: amylase in saliva
Ingestion
the process of taking in food through the mouth
Digestion
The physical and chemical breakdown of complex food molecules
Absorption
The transfer of digested nutrients from the digestive system to the bloodstream
Egestion
The removal of waste food materials from body
Gastrointestinal tract
tube from mouth to anus in which digestion takes place
Order of digestive organs
mouth
esophagus
stomach
duodenum
large intestine
rectum
anus
Saliva
Made and stored in salivary glands
contains enzymes, mucus and water
Tongue
pushes food to back of mouth for swallowing
