The process of breathing

Question 1

How does breathing occur

Answer 1

The diahgram contracts, making space in the chest and abdomen, which creates lower air pressure in the lungs, and with more ir pressure outside than inside the lungs, air rushes into the lungs.

Question 2

what is a diaphragm

Answer 2

it is a long sheet like muscle below the lungs, when contracted you breath in, when relaxed you breath out.

Question 3

what happens when you exhale

Answer 3

The volume of the chest cavity
decreases, air pressure inside the lungs increases, and air flows out of the lungs, like air
rushing out of a balloon.

Question 4

how is the rhythm contraction of the diaphragm controlled?

Answer 4

brain stems send nerve impulses to the diaphragm through the autonomic nervous system. The brain
stem monitors the level of carbon dioxide in the blood. If the level becomes too high, it
“tells” the diaphragm to contract more often. Breathing speeds up, and the excess carbon
dioxide is released into the air. The opposite events occur when the level of carbon dioxide
in the blood becomes too low.