PLEASE HURRY 80 POINTS Circulatory System This system delivers and to all the in the

body and and to the through blood vessels.

The main organ is the (the pump).

The blood vessels - arteries, veins, and .

Two systems in one:

1. Pulmonary circulation – sends blood from the to the

and back

2. Systemic circulation – sends blood to the rest of the

and back to the heart

Pulmonary Circulation

The are where the oxygen and nutrients are picked up by

the blood.

Also, where the carbon dioxide and other waste is from

the blood.

This happens in the (air sacs) of the lungs.

Systemic Circulation

Provides organs, tissues and cells with , so they get oxygen

and other nutrients.

Accomplished through the : veins, arteries and capillaries

The largest blood vessels have names.

Main Blood Vessels

Aorta is the main of the heart carrying oxygenated blood to all

parts of the body except the .

Vena Cava large carrying deoxygenated blood back to the heart.

Superior Vena Cava returns blood from the body.

Inferior Vena Cava returns blood from the body.