mouth
air/oxygen/carbon dioxide
food
nasal canal
pharynx
epiglottis
larynx
trachea
bronchi
bronchioles
lungs
alveoli
capillaries
pulmonary veins
esophagus
stomach
small intestine
large intestine
rectum
anus
diaphragm
ribs
left atrium
left ventricle
aorta
arteries
capillaries
tissue
veins
vena cava
right atrium
right ventricle
pulmonary artery