does the diaphragm contract or relax when we inhale?
contract
relaxes
how to make our lungs in shape?
regular exercise
eat healthy food
socialize to anybody around you
what is alveoli
blood vessels that flow through your heart
tiny sacs surrounded by blood vessels called cappilaries
this blood vessel is bigger than vein
Breathing in is called
exhalation
inhalation
what do the ribs do?
protect the heart
protect the lungs
protect the stomach
normal breathing rate at rest in adults in between...........
12-16
16-20
7-12
what is trachea
nose
wind pipe
hair in wind pipe
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