Circulatory System

What is the main organ of the circulatory system?

• small intestine

• bone

• lungs

• heart

The job of the heart is to . . .

• pump blood around the body.

• send food to the small intestines.

• break down food.

• give energy to the body.

The main function of the circulatory system is to

• Provide structure and support

• Transport blood, nutrients and gases around the body

• Excrete waste

• Send signals to the brain

Which part of the blood carries oxygen?

• White blood cells

• Red blood cells

• Platelets

• Plasma

How many types of blood vessels are in our body?

• 1

• 2

• 3

• 4

______________ are the smallest blood vessels.

• Arteries

• Veins

• Capillaries

______________ are the largest and strongest blood vessels. 

• Arteries

• Veins

• Capillaries

Which part of the blood kills pathogens(germs)?

• White blood cells

• Red blood cells

• Platelets

• Plasma

Which part of the blood creates scabs to stop us from losing blood?

• White blood cells

• Red blood cells

• Platelets

• Plasma

The heart has ___ chambers.

• 1

• 2

• 3

• 4