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The circulatory system consists of the _____, blood vessels, and ____.
heart, blood
A small flap of tissue that prevents blood from flowing backwards is called a _____.
valve
The hollow muscular organ that has walls made of strong muscle is called the _____.
heart
T or F? Blood is pumped to the lungs by the right side of the heart.
True
The number of times your heart beats in a minute is your ______.
heart rate
T or F? Blood only flows in one direction.
True
The push of blood through the blood vessels each time your heart beats is your _____.
pulse
The lower chambers on each side of the heart are called _____.
ventricles
The top chambers on each side of the heart are called _____.
atrium
The blood vessels that carry blood from the heart to all parts of the body are the _____.
arteries
The blood vessels that carry blood from the body back to the heart are the _____.
veins
The largest artery in the body is the _____.
aorta
The largest veins in the body are the _______.
venae cavae
What are the three main types of blood vessels?
arteries, veins, and capillaries
The smallest blood vessels connecting the arteries and veins are the ______.
capillaries
The gas that all of our cells need is _____.
oxygen
