Digestive system Flashcards
What is the digestive tract
A continuous tube that runs from your mouth to your anus
What is mucosa
the innermost layer of the internal lining which has a mucous membrane
What is ingestion
Placing of food and drink into the tract of the mouth
What is mechanical digestion
The physical breaking of food into smaller pieces
What is chemical digestion
The use of enzymes to break small pieces of food smaller
What is propulsion
the movment of ingested food
What is absorption
The movement of digested nutrients into the blood stream/ body fluids through the mucosa of the digestive wall
Defecation
fancy word for popping. Elimination of undigested material and waste products
Where does the process of digestion begin
Oral cavity (mouth)
What does pharynx mean
Throat
What does pharynx do
it is an involuntary action of smooth muscle in which waves of contraction occur behind the substance being propelled along a tube
What is peristalsis controlled by
autonomic motor nerves
What does mucosa (inner layer of the stomach) secrete
gastric juice
What does gastric juice contain
Mucus
Hydrochloric acid
What are the three regions of the small intestine
Duodenum
Jejunum
Ileum
