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.

Tags

NGSS.MS-LS1-3

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

• respiratory

• digestive

• muscular

• skeletal

Deoxygenated blood means that the blood is low in...

• Oxygen

• Carbon Dioxide

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

The part of the blood that carries oxygen is called ___________. (Remember we can't live without our blood-line)

• red blood cells

• white blood cells

True or false:  The circulatory system includes all of your bones.

• True
• False

Your heart is an example of which type of muscle?

• a big one
• voluntary
• involuntary
• bicep

The heart has ___ chambers.

• 1
• 2
• 3
• 4

What function does the heart do?

• Protects organs and produces red blood cells.
• Generates heat.
• Breaks down food into nutrients.
• The heart is a pump, which moves the blood. The arteries and veins are the pipes where the blood flows.