Quarter 4: Lesson 1.1: The Digestive System Flashcards
(16 cards)
what does food give
energy
what is the group of organs that changes food into usable form for the body
Digestive System
what are the four major functions of the digestive system
ingestion, digestion (mechanical and chemical), absorption, and elimination/excretion/egestion
the process of taking in food into the body
ingestion
food enters and exits the same opening
incomplete digestive system
food enters a mouth and exits an anus
complete digestive system
breaks food into smaller pieces
mechanical digestion
where does mechanical digestion happen
the mouth
breaks down food into simpler substances
chemical digestion
what helps with chemical digestion
enzymes
where does chemical digestion happen
mouth, stomach, and small intestine
these are special protein molecules that speed up chemical reaction
enzymes
act as a catalyst
enzymes
nutrients pass into the bloodstream through the small intestine walls
absorption
80% of water, vitamins, minerals, carbohydrates, proteins, and lipids are absorbed
absorption
process of removing undigested food or waste matter from teh body
excretion
