GCSE PE - Cardiovascular System 3

What is the main organ of the circulatory system?

• small intestine

• bone

• lungs

• heart

Arteries carry oxygen rich blood away from the heart.

• True

• False

Veins carry oxygen poor blood back to the heart.

• False

• True

______________ are the smallest blood vessels.

• Arteries
• Veins
• Capillaries

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

• respiratory
• digestive
• muscular
• skeletal

The circulatory system works with the __________ system to obtain energy from nutrients that we eat. 

• respiratory 
• digestive
• skeletal
• nervous

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

White blood cells

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

The main function of the red blood cells is to 

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

The plasma that contains blood cells is mainly made up of 

• cytoplasm
• nutrients
• waste
• water