Organisation

What are enzymes?

Proteins that speed up chemical reactions

What are carbohydrates?

sugars and starches

What are proteases?

Enzymes that break down proteins into amino acids

What are lipases?

Enzymes that break down lipids into fatty acids and glycerol.

What do the coronary arteries do?

supply blood to the heart

What do white blood cells do?

defend against pathogens

What do red blood cells do?

-They carry oxygen from the lungs to all the cells in the body

-They have a biconcave disc shape - creates a large surface area and allows them to fit through capillaries

-They have no nucleus - can store even more oxygen

-They contain haemoglobin - this binds to oxygen to form oxyhaemoglobin

Alveoli

tiny sacs of lung tissue specialized for the movement of gases between air and blood