The heart's job is to _______________.

Where is blood made in order to replenish the body's blood supply?

When the heart contracts blood is pushed into tubes called what?

How many types of Blood Vessels are there?

The heart has four holes inside it that fill up with blood when it relaxes.

When a muscle squeezes and tightens it is called a ____________.

The holes inside the heart each have names, but all together they are often referred to as _____________.

A human adult body has about how much blood?

Pick the 3 major types of blood cells.

What are the types of Blood Vessels?

Red Blood Cells contain a special protein called hemoglobin, which helps carry __________ from the lungs to the rest of the body.

The heart works like 2 pumps. One side pumps blood to the whole body while the other side pumps blood to the _________ and back.

When the hemoglobin of blood is carrying oxygen the blood appears to be bright red and is called "oxygenated blood".

The Circulatory system is primarily made up of these 3 things:

The Circulatory system is also called the Cardiovascular system.

If you took all the blood vessels out of an average child and laid them out in one line, the line would stretch over 60,000 miles- enough to go around the earth more than twice.

Heart disease is the is the number 2 cause of death in America, right behind cancer.

2 terms used to explain the "thumping" or vibration of the heart pushing blood through the blood vessels are:

Your "resting" heart rate can be measured when you are ________________.

The period right after strenuous activity or exercise when your heart rate is slowing back to normal is sometimes called the _______________ period.

Another term for a "heart attack" is

Heart attacks most commonly occur when one or more of the coronary arteries — the blood vessels that supply blood to the heart — become blocked.

Your heart is located in your chest and is about the size of _________________.