circulatory system

What is the main organ of the circulatory system?

• small intestine

• bone

• lungs

• heart

Arteries carry blood rich in oxygen away from the heart.

• True

• False

Veins carry blood poor in oxygen back to the heart.

• False

• True

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 heart is about the size and shape of your . . .

• head

• fist

• hand

• foot

Where in your body can you find blood vessels?

• around the heart
• in hands & feet
• in your head
• virtually everywhere

This type of vessel carries blood TO the heart:

• vein
• nerve
• muscle
• artery

When blood with oxygen is carried AWAY from the heart, it travels through an...

• artery

• neuron

• vein

• straw

Carbon dioxide is considered a _________________

• food
• waste
• energy
• fun party favor