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(How do we breathe image, What happens to the food we eat image, Why does…
How do we breathe
The exchange of gases in the body
oxygenblood
carbon dioxide
oxygen
How our diaphragm works
ribacage
diaphragm
lungs
The respiratory system
mouth
trachea
nose
What happens to the food we eat
The stages of digestion
propulsion
absorption
Ingestion
The digestive system
oesophagus
stomach
small intestine
Why does the heart beat
The circulatory system
red blood cells
white blood cells
plasma
Blood circulatory
right ventricle
pulmonary artery
deoxygenated blood
How does the body clean blood
The urinary system
kidneys urine
renal veins
renal arteries
The sweat glands
dermis pores epidermis
evaporates
sweat glands
