Circulatory System

___ are tiny blood vessels that carry blood to an from almost all body cells and connect arteries and veins.

• arteries

• veins

• capillaries

What is the main organ of the circulatory system?

• small intestine

• bone

• lungs

• heart

Tags

NGSS.MS-LS1-3

Arteries carry oxygen rich blood away from the heart.

• True

• False

Veins carry oxygen poor blood back to the heart.

• False

• True

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.4-LS1-1

______________ are the smallest blood vessels.

• Arteries
• Veins
• Capillaries

______________ are the second largest blood vessel. 

• Arteries
• Veins
• Capillaries

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

• respiratory
• digestive
• muscular
• skeletal

Tags

NGSS.HS-LS1-7

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

• respiratory 
• digestive
• skeletal
• nervous

Tags

NGSS.MS-LS1-7

Which of the following is a synonym for the circulatory system?

• respiratory system
• digestive system
• nervous system
• cardiovascular system