Digestive and circulatory system

1

2

3

4

A

B

C

D

A

B

C

D

Deoxygenated blood in the left side mixed with oxygenated blood in the right side of the heart

Deoxygenated blood in the right side mixed with oxygenated blood in the left side of the heart

Deoxygenated blood in the left atrium mixed with oxygenated blood in the right ventricle of the heart

Because the leaky of the blood out of the heart

A

B

C

D

They carry blood at low pressure

They have valves

They have a pulse

They return blood to the heart.

Transport of hormones

Phagocytosis

Antibody production

Blood clotting

To reduce pressure of blood returning from the lungs to supply cells of the body most effciently with the reactants for respiration.

To increase the pressure of blood sent to the lungs to supply cells of the body most effciently with the reactants for respiration.

. To increase the pressure of blood returning from the lungs to supply cells of the body most effciently with the reactants for respiration.

To reduce pressure of blood sent to the lungs to supply the cells most effciently with the products for respiration.

X = Atrioventricular valve,

Y = Semilunar valve,

Z = Septum

X = Semilunar valve

Y = Atrioventricular valve,

Z = Septum

X = Semilunar valve

Y = Semilunar valve,

Z = Atrioventricular valve

X = Atrioventricular valve,

Y = Atrioventricular valve,

Z = Septum

To emulsify proteins

To neutralise the alkaline conditions of food entering the duodenum

To provide enzymes for the digestion of lipids

To increase the surface area of lipids for digestion

Breaking food up into smaller pieces by chewing it

Starch being broken down into glucose molecules.

Food being churned when the muscles in the stomach lining contracts.

Bile breaking large fat droplets up into smaller ones during emulsification