Human Systems
Circulatory
Respiratory
Digestive
Food enters through the mouth and is broken down by teeth and saliva
Food is moved down esophagus
Stomach breaks down food again through muscle contractions and stomach acid.
The small intestine absorbs nutrients and further breaks down the food.
The large intestine wicks away liquids and compresses food into feces
Rectum stores the feces until it can be expelled from the body
Anus expels feces from the body
Air is inhaled through the mouth or nose
Air reaches the pharynx. Both food and oxygen pass through the pharynx
Air then passes through the Larynx (voice box)
Air travels down the trachea towards the bronchi
Air reaches the Bronchi where it splits into two bronchioles
Bronchioles transport air to the alveoli
In the alveoli, oxygen is mixed into the blood stream and carbon dioxide waste is removed from blood in order to be
De-oxygenated blood enters the hearth through the right atrium
blood is pumped into the left ventricle before being pumped out to the lungs via the pulmonary arteries
Oxygenated air returns from the lungs in the pulmonary veins, and into the left atrium
Then the blood is pushed into the left ventricle before being pumped out to the rest of the body via the aorta