The job of the red blood cell is to

• fight infection
• deliver oxygen and discard carbon dioxide
• form scabs

The four parts of the blood are

• plasma, platelets, red blood cells, white blood cells
• plasma, blue blood cells, white blood cells, red blood cells
• ventricle, atrium, vein, artery

The air sacs in the lungs are called

• bronci
• lasagne
• alveoli

The main branches that lead from the trachea to the lungs are called

• bronchioles
• bronchial tubes
• bronchi

The heart has how many chambers (rooms)?

• four
• three
• two

Arteries carry blood _________ from the heart.

• to
• away

Capillaries connect veins to

• other capillaries
• veins
• arteries

The right side of the heart sends blood to the 

• body
• lungs

Your pulse tells how fast your ___________ is beating.

• heart
• lungs

The left side of the heart sends blood out of the heart to 

• your lungs
• the rest of your body