Question

Explain process of breathing in humans?

Answer 1

Answer:

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Human respiratory system:-

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the human respiratory system begins from nostrils. The trachea divides the neck into two tubes called bronchi .Each bronchi is connected to lung .In the lung each bronchi is divided into bronchioles .The bronchioles have a tiny air sac at their end are called alveoli.

Mechanism of breathing :-

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When we breathe in air ,the diaphragm contracts which results in the increase of volume of chest cavity .Due to this expansion of chest cavity ,the air pressure in lungs decreases .Thus air from outside rushes into the lungs through nostrils,trachea and bronchi .Therefore air of sacs of lungs filled with air we breathe in .The exchange of gases take place with helps of diffusion process in blood and alveoli.

Now the air present in sacs of lungs is rich in Co2 .When we breathe out air the diaphragm relaxes which results in decreases of chest cavity .The contraction pushes the air from lungs into the trachea,nostrils and then out of body into air.

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Let us also discuss about Breathing?

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• It is a simple process
• Breathing in air is called inhalation
• Breathing out air is called exhalation

______________Hope helps ❤

Answer 2

Answer:When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.