Digestion Flashcards
(25 cards)
Ingestion/eating
Food is taken in by the body
Digestion
Food is broken down
Absorption
Digested food passes into the bloodstream
Assimilation
Using the food in the cells of the body
Elimination
Getting rid of undigested food
Enzymes
Are chemicals that speed up reactions without being used up in the reaction.enzymes act on a substrate and breaks it down into a product example substrate =starch enzyme = amylase (saliva) product =maltose (sugar)
Phisical digestion
It happens in the mouth with teeth and in the stomach with churring
Chemical digestion
Involves the use of chemicals called enzymes to break down food
Mouth
physical and chemical digestion
Oesophagus
brings food from mouth to stomach
Liver
Makes bile
Stomach
Physical and chemical digestion
Pancreas
makes digestive juices
Small intestine
Most chemical digestion
Large intestine
Water reabsorption
Rectum
Stores undigested food
Anus
Undigested food passes out
Gall bladder
Storage of bile
Incisors
At the front of the mouth.
4 upper and 4 lower.
Used for biting and cutting food.
Canine
One at either side of the incisors.
2 upper and 2 lower. Grasp and tear food.
Pre-molar
3 at either side of the canine.
6 upper and 6 lower.
Grind and crush food.
Molars
2 at either side of the premolars.
4 upper and 4 lower.
Grind and crush
food.
The teeth an animal has depends on what it ea
Herbivore
Only eats plants
Very large incisors
Large molars and pre-molars to chew grass.
Carnivore
Only eats meat
Large canine teeth
Use the teeth to catch and tear their prey
