How many chambers does the heart have?

• 4

• 3

• 6

• 1

How does the heart work?

• It pumps blood first to the lungs, back to the heart and then around the rest of the body.

• It pumps blood first to the rest of the body, back to the lungs and then to the heart.

• It pumps blood around the rest of the body, back to the heart and then to the lungs,

The circulatory system works with the ___________ system to provide our body with oxygen.

• respiratory

• digestive

• muscular

• skeletal

About how big is the human heart?

• the size of your nose

• the size of your foot

• the size of your fist

• the size of your ear

As the blood reaches the lungs, what is removed from the blood?

• oxygen

• carbon dioxide

• red blood cells

• white blood cells

Arteries carry oxygen rich blood away from the heart.

• True

• False

Veins carry oxygen poor blood back to the heart.

• False

• True

______________ are the smallest blood vessels.

• Arteries
• Veins
• Capillaries

Which of the following does the circulatory not consist of?

• Heart

• Lungs

• Blood

• Blood vessles

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.