Medical Science - Circulatory System

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

True or False: The circulatory system does not help the body regulate temperature

• True
• False

The main function of the red blood cells is to 

• allow gases to exchange
• fight infection
• give blood its color
• help clot blood

The heart is the size of

• your thumb
• your fist
• your ribcage
• your kitchen table

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

• True
• False

A capillary is an extremely small blood vessel located within the __________ of the body, that transports blood from arteries to veins.

• organelles
• tissues
• cells

Capillaries join together

• veins and arteries
• veins and the heart
• arteries and veins
• heart and valves

Blood vessels are 

• veins
• capillaries
• arteries
• all of them

Veins carry blood _________  the heart.

• back to 
• away
• parallel

Arteries carry nutrient and oxygen rich blood _____________ from the heart.

• back to
• away
• parallel