Stages Of Nutrition 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
Physical Digestion
Taking large pieces of food and breaking
them down into smaller pieces.
Happens in the
Mouth (Teeth)
Stomach (churning)
Chemical digestion
Involves the use of chemicals called enzymes to breakdown food
Chemical digestion
Enzymes are
chemicals that
speed up reactions without being used
up in the reaction
Chemical digestion How enzymes work
Enzymes act on a substrate and breaks it down into a product e.g. substrate=starch,enzymes amylase (saliva),product= maltose (sugar)
Chemical digestion
Amylase in mouth
Chemical digestion
Enzymes in the stomach
Chemical digestion
Most chemical digestion happens in small intestine
Chemical digestion
Bile made in liver to
break down fats
Chemical digestion
Pancreas makes
digeslive juices
which contain enzymes