Digestion Flashcards
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
Chemical digestion
Involves the use of chemicals called enzymes to break down 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)
Where does most chemical digestion happen in?
Most chemical digestion happens in small intestine
Bile
Made in liver to break down fats
Pancreas makes
Digestive juices which contain enzymes
Physical digestion happens in
The mouth when teeth and stomach are churning
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
Different types of teeth
1. Incisors
2. Canine.
3. Pre molars
4. Molars
Herbivore
Only eats plants
Very large intestine
Large molars to chew grass
Carnivores
Only eat meat
Large canine teeth
Use their teeth to eat and catch prey
Omnivores
Eat plants and meat
Needs all types of teeth