4 major vessels

vena cava

into the right atrium

pulmonary trunk/arteries

out of the right ventricle

pulmonary veins

into the left atrium

aorta

out of the left ventricle.

step 1

body- right atrium. Oxygen-poor blood comes back through the vena cavae (superior from the upper body, inferior from the lower body).

step 2

1. Right atrium → right ventricle, through the tricuspid valve

step 3

1. Right ventricle → lungs. Blood goes through the pulmonary valve into the pulmonary arteries.

step 4

1. In the lungs, blood drops off CO₂ and picks up O₂.

step 5

In the lungs, blood drops off CO₂ and picks up O₂.

step 6

1. In the lungs, blood drops off CO₂ and picks up O₂.

step 7

1. Left ventricle → body. Blood goes through the aortic valve into the aorta, which carries it to the whole body.

step 8

The body uses the oxygen, and the blood returns through the vena cavae to start again

the heart is two pumps side by side, what does the right side send

sends blood to the lungs to pick up oxygen

what does the left side pump do

sends oxygen rich blood to the rest of the body