Human Health And Systems

Question 1

Ingestion/eating

Answer 1

Food is taken in by the body.

Question 2

Digestion

Answer 2

Food is broken down.

Question 3

Absorption

Answer 3

Digested food is passed through the blooodstream

Question 4

Assimilation

Answer 4

Using the food in the cells of the body

Question 5

Elimination

Answer 5

Getting rid of undigested food

Question 6

Physical digestion

Answer 6

Taking large pieces of food and breaking them down into smaller pieces. Happens in the mouth (teeth)
Stomach (churning)

Question 7

Chemical digestion

Answer 7

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 (catalyst)

• Enzymes act on a substrate and
breaks it down into a product
Example: substrate starch, enzyme = amylase (saliva),
product = maltose (sugar)

Question 8

Chemical digestion

Answer 8

Amylase in mouth
Enzymes in the
stomach
Most chemical digestion happens in small intestine
Bile made in liver to break down fat
Pancreas makes digestive juices which contain enzymes