Question

explain the mechanism of breathing in human beings

Answer 1

hyy friend here is ur answer
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When we inhale air,it passes through
our nostrils into the nasal cavity. from
the nasal cavity,the air reaches our lungs
through the wind pipe.lungs are present
in the chest cavity.this cavity is
sorrounded by ribs.a large muscular
sheet called diaphram forms the floor of
the chest cavity.breathing involves the
movement of the diaphram and the rib
cage.during inhalation,ribs moves up and
outwards and diaphram moves down.this
movement increases space in our chest
cavity and air rushes into the lungs.the
lungs get filled with air.during
exhalation,ribs move down and inwards
while diaphram moves up to its former
position.this redues the size of the chest
cavity and air is pushed out of the
lungs.
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Answer 2

your answer ....
hope it is helpful.........☺