An Overview of the Cardiovascular System

What is the main function (the job) of the circulatory system?

• to pick up excess fluids from the interstitial spaces

• to support the lymphatic system by carrying substances around the body

• to pump blood throughout the body to supply cells and tissues with the food and oxygen they need to survive

• to fall in love

How many cells are there in the human body?

• thousands

• millions

• billions

• trillions

What kind of cells carry oxygen?

• erythrocytes

• leukocytes

• phagocytes

• battery cells

What does pulmonary mean?

• circulation

• pertaining to the lung

• pertaining to the heart

• about pulling a wagon

What is pulmonary circulation?

• Oxygenated blood is pumped from the left ventricle of the heart through the aorta, the largest artery in the body. The blood moves from the aorta through the systemic arteries, then to arterioles and capillary beds that supply body tissues.

• Pulmonary circulation moves blood between the heart and the lungs. It transports deoxygenated blood to the lungs to absorb oxygen and release carbon dioxide.

Which side of the heart pumps deoxygenated blood to the lungs?

• right

• left

• outside

• front

How thick are the walls of the capillaries?

• 100 cells

• one cell

• zero

• it depends on the day

What is systemic circulation?

• Systemic circulation moves blood between the heart and the rest of the body. It sends oxygenated blood out to cells and returns deoxygenated blood to the heart.

• Systemic circulation moves blood between the heart and the lungs. It transports deoxygenated blood to the lungs to absorb oxygen and release carbon dioxide.

The right side of the heart pumps freshly oxygenated blood to all the cells of the body.

• True

• False

Freshly oxygenated blood turns bright (a)   .