Question

State the role of the following in the human respiratory system:-
a) nasal cavity
b) diaphragm
c)alveoli
d) trachea

Answer 1

HEYAA.....

HERE'S YOUR ANSWER..
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NASAL CAVITY:-
It help to inhale and exhale air and hairs present in there helps in purification..

DIFRAGRAM :-
It expands while inhalation and contrast while exalation.

ALVEOLI:-
It is balloon like structure which is surrounded by blood vessels which contains co2 and when oxygen enters into it...it helps in exchange of gases.

TRACHEA:-
It is also called as wind pipe. It is a track in which oxygen enters the lungs.
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HOPE THIS HELPS

_____SUNAYANA • ACE

Answer 2

1 Nasal hair or nose hair is the hair in the nose. Adult humans have hair in the interior nasal passage. Nasal hair functions include filtering foreign particles from entering the nasal cavity and collecting moisture.
2 The diaphragm separates the thoracic cavity, containing the heart and lungs, from the abdominal cavity and performs an important function in respiration: as the diaphragm contracts, the volume of the thoracic cavity increases and air is drawn into the lungs
3 At the same time, carbon dioxide (CO2) is transmitted from the blood capillaries into the alveoli and then expelled through the bronchi and the upper respiratory tract. The inner surface of the lungs where the exchange of gases takes place is very large, due to the structure of the air sacs of the alveoli.
4.The trachea, colloquially called the windpipe, is a cartilaginous tube that connects the pharynx and larynx to the lungs, allowing the passage of air, and so is present in almost all air-breathing animals with lungs. The trachea extends from the larynx and branches into the two primary bronchi.