Circulatory System

What are the main organs of the circulatory system?

• brain, spine, & nerves

• heart, arteries, & veins

• heart, lungs, & veins

• skin, nails, & hair

The main function of the circulatory system is 

• To give the body structure and support
• Excrete waste
• transport blood, nutrients, and gases throughout the body
• to transport messages from the body to the brain

The ​ (a)   is responsible for extracting the ​ (b)   from the air, that our cells need. It also eliminates ​ (c)   , a gas that cells produce as ​ (d)   .

• respiratory system
• oxygen
• carbon dioxide
• waste

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

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

Which body system is shown here?

• circulatory system

• respiratory system