Circulatory System

The bottom chambers of the heart are called

• ventricles
• atria
• vena cava
• valves

_________ Carry blood away from the heart to various organs

• Arteries
• Capillaries
• Veins

__________ Very small tubes that connect arteries to veins; the smallest blood vessels.

• Veins
• Capillaries 
• Arteries

What is the main organ in the circulatory system?

• vein
• lung
• heart
• aorta 

What is the function of the heart?

• To pump blood around the body
• To remove oxygen from the blood
• To allow blood to flow through it 
• To breath

How many types of blood vessels are in our body?

• 1
• 2
• 3
• 4

Veins carry oxygen poor blood back to the heart.

• False
• True

Carbon dioxide is considered a _________________

• food
• waste
• energy
• fun party favor

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

• respiratory
• digestive
• muscular
• skeletal

Red blood cells transport __________ around our body.

• oxygen
• plasma
• bones
• cardiac muscles