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consists of the mouth, esophagus, stomach and small and large intestines
breaks down food into small molecules that travel in blood for cellular respiration (energy)
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Consists of heart, blood vessels and blood
Human heart has four chambers, bottom two are called ventricles, responsible for pumping blood throughout body
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All body systems depend on each other! The digestive system provides broken down food molecules for cellular respiration to occur. The respiratory systems brings in oxygen and gets rid of carbon dioxide -- also contributes to CR. The circulatory system allows the gases to travel in the blood and be exchanged in the body and the excretory system gets rid of extra water, salt and wastes. If there is a problem with one system, other systems will be affected. All must maintain homeostasis -- balance within the body.
Consists of the nose, trachea, lungs and diaphragm - muscle responsible for inhaling and exhaling.
Brings oxygen into the body (lungs) and lungs deliver it to the bloodstream so gas exchange can take place
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consists of kidneys, bladder
gets rid of nitrogen, excess water and salt