Blood, oxygen, and food are pumped to the muscles
Blood brings important nutrients from food (like calcium) to the bones
Spinal column protects the spinal cord. Skull protects the brain
Diaphragm, an involuntary muscle, forces breath in and out
Filters out harmful wastes to help protect the spinal cord
Muscles of the respiratory system need energy from digested food in order to function
Filters out harmful waste to help protect the stomach
Oxygenated blood is pumped through the heart and then circulated through cells. Red blood cells move oxygen and carbon dioxide through the blood. Alveoli exchange gas with capillaries.
