Human Circulatory System PreAssess

What is the main organ of the circulatory system?

• small intestine

• bone

• lungs

• heart

Tags

NGSS.MS-LS1-3

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.

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

• head

• fist

• hand

• foot

______________ 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

______________ are the second largest blood vessel. 

• Arteries
• Veins
• Capillaries

Running is an activity that causes the cells in the muscular system to use oxygen at a faster rate. Which system responds by delivering more oxygen to these cells?

• digestive

• nervous

• circulatory

• endocrine

What is the main function of the circulatory system?

• secrete enzymes

• digest proteins

• produce hormones

• transport materials

Which gas is transported by the circulatory system in humans and is used by cells during respiration to release energy stored in food?

• carbon dioxide

• nitrogen

• hydrogen

• oxygen

Tags

NGSS.MS-LS1-7

Select the structure and explanation of how it contributes to the way the human system functions.

• heart replaces carbon dioxide with oxygen

• blood vessels transport nutrients and oxygen

• heart replaces oxygen with carbon dioxide

• blood vessels pump heart rate

Tags

NGSS.MS-LS1-3