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
Enzymes are chemicals that speed up reaction 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)
Chemical digestion
Amylase in mouth
Enzymes in stomach
Most chemical digestion happens in small intestine
Bike made in liver to break down fats
Pancreas makes digestive juices which contain enzymes
Physical digestion
Taking large pieces of food and breaking them down into smaller pieces happen in the
mouth (teeth)
stomach (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