The Digestive System Flashcards
What is the digestive system?
The system that breaks food into smaller molecules and moves it into the bloodstream.
What are the two types of digestion?
- Physical
- Chemical
What is physical digestion?
Breaking down food using physical means
What is chemical digestion?
Breaking down food using enzymes and chemical reactions
What are the 5 steps of digestion.
- Ingestion
- Digestion
- Absorption
4 Assimilation - Egestion
Name the four types of teeth
- Incisors
- Canines
- Premolars
- Molars
What’s an enzyme?
A biological catalyst.
What’s a catalyst?
A substance that changes the rate of a chemical reaction without being used by itself
What breaks down starch?
Amylase
What does amylase turn starch into?
Maltose
What is maltose broken down by?
Maltase
What does maltase turn maltose into?
Glucose ( a simple sugar )
Why does may amylase break down starch?
To turn it into a simple sugar, that can be transferred into the bloodstream.
What is ingestion?
Food is taken in through the mouth.
What is digestion?
Complex food molecules are broken down into simpler molecules
What is absorption?
Products of digestion enter the bloodstream
What is Assimilation?
When absorbed nutrients are converted to molecules for growth, repair and body cell defence.
What is egestion?
When waste products are removed from the body.
How does the oesophagus move food?
Through peristalsis
What does the stomach do?
It stores and digests food
What does the small intestine do?
Where the food is absorbed into the bloodstream and taken to different parts of the body
What is the duodenum
The part of the small intestine attached to the stomach
What are villi/ or a villus?
Small folds that line the small intestine
What do villi do?
Absorb substances into the bloodstream
