Human Body System

True or False. Three types of blood cells are red blood cells, white blood cells, and blue blood cells.​ (a)  

• false
• true

​ (a)   carry oxygen to the rest of the body.

• Red blood cells
• White blood cells
• Platelets

(true or false) Carbon dioxide enters the bloodstream through the air sacs ​ (a)   .

• false
• true

All multicellular organisms need ​ (a)   for their cells to get the energy they need.

 

• oxygen
• carbon dioxide
• nitrogen

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

​ (a)   is liquid in the mouth that has chemicals that digest food.

• saliva
• mucus
• sweat

Helpful bacteria live in the ​ (a)   .

• large intestine
• small intestine
• esophagus

The (a)   are vessels that carry blood away from your heart to other parts of your body.

• arteries
• veins
• capillaries

​ (a)   form a sticky clot when a blood vessel is cut.

• platelets
• red blood cells
• white blood cells

​

(true or false) Your diaphragm relaxes and moves up when you inhale ​ ​ (a)   .

 

• false
• true

(true or false) The digestive system helps your body break down food​ (a)   .

 

• true
• false