The Human Circulatory System

The heart is made of what?

• Blood

• Bone

• Marrow

• Muscle

The heart's job is to _______________.

• Beat

• Pump Blood

• Keep us alive.

• Make blood

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

• the brain

• inside the kidneys

• inside your bones from bone marrow

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

• Blood straws

• Nerves

• Blood vessels

• Blood veins

How many types of Blood Vessels are there?

• 3

• 6

• 9

• 106

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

• True

• False

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

• contraction

• tear

• fracture

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

• Cells

• Chambers

• Vessels

A human adult body has about how much blood?

• 5 liters

• 2 cups

• 7 Gallons

Pick the 3 major types of blood cells.

• Red Blood Cells

• White Blood Cells

• Blue Blood Cells

• Platelets