Describe respiratory system of humans with labelled diagram.
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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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Respiratory system :
pathway of air :
Nostrils => Nasal cavity => Pharynx => Larynx => Trachea = Bronchus => Bronchioles => Alevelos => Blood.
Nostrils : Air enters into our body through Nostrils.
Nasal cavity : In nasal cavity the air is filtered. The cavity has hairs growing from the sides which remove dust In the air. And the cavity is moist.
Pharynx : This is the common passage of digestive tract and wind pipe. Here, Epiglottis a flap like muscular valve controls the food and wind to thier respective passages.
Layrnx : This part contains our vocal cords. when air moves over them, they vibrate and produce sound!
Trachea : Wind pipe channeling to trachea. and to lungs.
Bronchus : Wind pipe is divided into two pipes one leading to each lung.
Bronchioles : The Bronchus is divided into further smaller branches called Bronchioles.
Alevelos : These are clusters of air sacs. They are numerous. here blood capillaries take up the oxygen and expel CO2.
Blood : And finally oxygen dissolves in blood and travels to each and every cell.
DIAPHRAGM.
An important part which helps in respiration. it is done shaped.
Mechanism of diaphragm :
During inhalation the dome shaped diaphragm flattens and the volume of chest cavity increases. As a result air outside rushes into the lungs.
During exhalation the diaphragm relaxes and retains it dome shape. And as a result the volume of chest cavity decreases and air inside the lungs rushes out.
:)
pathway of air :
Nostrils => Nasal cavity => Pharynx => Larynx => Trachea = Bronchus => Bronchioles => Alevelos => Blood.
Nostrils : Air enters into our body through Nostrils.
Nasal cavity : In nasal cavity the air is filtered. The cavity has hairs growing from the sides which remove dust In the air. And the cavity is moist.
Pharynx : This is the common passage of digestive tract and wind pipe. Here, Epiglottis a flap like muscular valve controls the food and wind to thier respective passages.
Layrnx : This part contains our vocal cords. when air moves over them, they vibrate and produce sound!
Trachea : Wind pipe channeling to trachea. and to lungs.
Bronchus : Wind pipe is divided into two pipes one leading to each lung.
Bronchioles : The Bronchus is divided into further smaller branches called Bronchioles.
Alevelos : These are clusters of air sacs. They are numerous. here blood capillaries take up the oxygen and expel CO2.
Blood : And finally oxygen dissolves in blood and travels to each and every cell.
DIAPHRAGM.
An important part which helps in respiration. it is done shaped.
Mechanism of diaphragm :
During inhalation the dome shaped diaphragm flattens and the volume of chest cavity increases. As a result air outside rushes into the lungs.
During exhalation the diaphragm relaxes and retains it dome shape. And as a result the volume of chest cavity decreases and air inside the lungs rushes out.
:)
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