Digestive, circulatory, respiratory systems

Match it! Select the correct answer from the pull down...Good luck!

These microscopic air sacs in the lungs are where oxygen and carbon dioxide are exchanged.

____________ is the process by which nutrient molecules are passed from the digestive system into blood.

These organs expand and shrink to keep air in while gas exchange occurs

___________ is the process the body uses to break down food.

The ____ is a dome shaped musce when it is relaxed that helps change the size of the chest cavity while breathing.

These blood vessels take blood away from the heart

_________ are bean-shaped organs that create and excrete urine.

This number represents a typical or central value