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

The heart is about the size and shape of your . . .

• head

• fist

• hand

• foot

How does the heart work?

• It pumps blood first to the lungs, back to the heart and then around the rest of the body.

• It pumps blood first to the rest of the body, back to the lungs and then to the heart.

• It pumps blood around the rest of the body, back to the heart and then to the lungs,

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

The aorta is the largest artery in the body. The blood leaving the aorta is full of?

• Oxygen 
• Carbon Dioxide 
• White blood Cells 
• Potassium 

A flap of tissue that prevents blood from flowing backward

• Aorta
• Atrium
• Septum
• Valve