explain the structure of human respiratory system
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Answered by
76
The main function of the human respiratory system is to breathe in oxygen for respiration. and to breathe out carbon dioxide. and to provide energy to the body by the breaking down the food particles.
Respiration covers three process :- ventilation or breathing ( taking in oxygen and expelling carbon dioxide), external respiration ( the exchange of gases between the lungs and the blood), and internal respiration ( food breakdown , using oxygen and producing carbon dioxide).
The major organs of respiratory system in a human being are :-
★ nose
★ Nassal passage
★ Trachea
★ bronchi
★ lungs
★ diaphragm
The nasal passage is lined with fine hair and mucus. when air passes through the nasal passage , the dust particles and other impurities present in it are trapped by the nasal hair and mucus. due to this only clean air reaches the lungs.
The walls of Trachea do not collapse when there is less hair in it because Trachea is supported by rings of soft bones called cartilages.
Gaseous exchange in our body takes place in the alveoli of lungs. The oxygen of air diffuses out from the alveoli walls into the blood. as the blood passes through the tissues of the body, the oxygen present in it diffuses into the cells. this oxygen combines with the digested food present in the cells, to release energy. carbon dioxide gas, which is produced as a waste product during respiration in the cells of the body tissues, diffuses into the blood. blood carries the oxygen back to the lungs, where it is diffused into the alveoli.
The human lungs have been designed to maximize the exchange of gases. There are millions of alveoli in the lungs. The presence of million of alveoli in the lungs provides a very large area for the exchange of gases . the availability of large surface area maximises the exchange of gases.
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BEST OF LUCK :-)
#akashmandal .
Respiration covers three process :- ventilation or breathing ( taking in oxygen and expelling carbon dioxide), external respiration ( the exchange of gases between the lungs and the blood), and internal respiration ( food breakdown , using oxygen and producing carbon dioxide).
The major organs of respiratory system in a human being are :-
★ nose
★ Nassal passage
★ Trachea
★ bronchi
★ lungs
★ diaphragm
The nasal passage is lined with fine hair and mucus. when air passes through the nasal passage , the dust particles and other impurities present in it are trapped by the nasal hair and mucus. due to this only clean air reaches the lungs.
The walls of Trachea do not collapse when there is less hair in it because Trachea is supported by rings of soft bones called cartilages.
Gaseous exchange in our body takes place in the alveoli of lungs. The oxygen of air diffuses out from the alveoli walls into the blood. as the blood passes through the tissues of the body, the oxygen present in it diffuses into the cells. this oxygen combines with the digested food present in the cells, to release energy. carbon dioxide gas, which is produced as a waste product during respiration in the cells of the body tissues, diffuses into the blood. blood carries the oxygen back to the lungs, where it is diffused into the alveoli.
The human lungs have been designed to maximize the exchange of gases. There are millions of alveoli in the lungs. The presence of million of alveoli in the lungs provides a very large area for the exchange of gases . the availability of large surface area maximises the exchange of gases.
-------------------------------------------------
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BEST OF LUCK :-)
#akashmandal .
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Answered by
49
The air , passes through the nostrils.
The air that is passing is filtered by the fine hairs , which lines the passage.
Also , mucus helps in lining the passage , in the process involved.
From here , air passes through the throat and then into the lungs
In the throat , rings of cartilage are present , which ensures that the air passage does not collapse.
In the lungs , the passage is divided into very smaller tubes , that terminate into balloon like structures known as alveoli.
Alveoli is a surface that helps in the exchange of gases.
Extensive network of blood vessels is present in the walls of alveoli
When we breathe in , our ribs are lifted and diaphragm is flattened.
As a result , chest cavity becomes larger in size.
Therefore ,the air is sucked into the lungs , expanding the alveoli
Carbon dioxide are released into the alveoli by blood.
Oxygen in the alveolar air is taken by alveolar blood vessels , and is transported to all the cells in the body.
The air that is passing is filtered by the fine hairs , which lines the passage.
Also , mucus helps in lining the passage , in the process involved.
From here , air passes through the throat and then into the lungs
In the throat , rings of cartilage are present , which ensures that the air passage does not collapse.
In the lungs , the passage is divided into very smaller tubes , that terminate into balloon like structures known as alveoli.
Alveoli is a surface that helps in the exchange of gases.
Extensive network of blood vessels is present in the walls of alveoli
When we breathe in , our ribs are lifted and diaphragm is flattened.
As a result , chest cavity becomes larger in size.
Therefore ,the air is sucked into the lungs , expanding the alveoli
Carbon dioxide are released into the alveoli by blood.
Oxygen in the alveolar air is taken by alveolar blood vessels , and is transported to all the cells in the body.
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