Cardiovascular System

Front

Main structure of the cardiovascular system

Back

The main structure is a fist-sized organ known as the heart that pumps blood around the body.

Front

Function of the heart muscle

Back

The heart is a muscle that contracts (to tighten and become smaller in length) and relaxes constantly to do its job.

Front

Path of blood in the cardiovascular system

Back

Blood moves from the heart to the lungs and then back to the heart again before it’s transported to the rest of the body through vessels.

Front

First step in the double loop system

Back

Blood travels from the heart to the lungs and then back to the heart.

Front

Oxygenated blood in the double loop system

Back

Oxygenated blood (blood that is high in oxygen) moves from the heart out to the body.

Front

Deoxygenated blood in the double loop system

Back

Deoxygenated blood (blood that is low in oxygen) is returned to the heart.

Front

Chambers of the Heart

Back

The heart has four chambers: right atrium, right ventricle, left atrium, and left ventricle. Oxygen-poor blood is shown in blue, and oxygen-rich blood is shown in red.

Front

Path of blood through the heart

Back

Blood travels: - From the lungs - To the left atrium down to the left ventricle - Takes nutrients and oxygen to the cells of the body - Picks up waste products like CO2 - Returns to the heart through the right atrium - To the right ventricle and - Out to the lungs where gas is exchanged

Front

Structural similarity between arteries and veins

Back

Arteries and veins are similar in structure in that they are made of 3 layers of tissue for transporting the blood.

Front

Difference in wall structure between capillaries and arteries/veins

Back

Capillaries have much thinner walls (1 layer of tissue) to allow the exchange of material to flow through in and out of the vessels.