human respiratory system| માનવ શ્વસનતંત્ર| Manav swasantantra સામાન્ય જીવ વિજ્ઞાન Science Biology

human respiratory system| માનવ શ્વસનતંત્ર| Manav swasantantra સામાન્ય જીવ વિજ્ઞાન Science Biology

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Nose and mouth, Pharynx, Larynx, Trachea, Bronchi,Lungs, Alveoli, Inhalation,Gas exchange

tem is a network of organs that allows for breathing and gas exchange, taking in oxygen and expelling carbon dioxide. Key components include the nose, mouth, pharynx, larynx, trachea, bronchi, lungs, and alveoli. Breathing involves muscles like the diaphragm, while gas exchange happens in the tiny air sacs (alveoli) within the lungs, where oxygen enters the bloodstream and carbon dioxide leaves it.
Main organs and their functions
Nose and mouth: The entry points for air, which is filtered, warmed, and humidified in the nose.
Pharynx: The throat, which connects the nose and mouth to the larynx and is also involved in swallowing.
Larynx: The voice box, which contains the vocal cords and helps with sound production.
Trachea: The windpipe that connects the larynx to the bronchi. It is lined with cilia to help move mucus and debris out of the lungs.
Bronchi: The two large tubes that branch off the trachea and lead into the lungs, which further branch into smaller bronchioles.
Lungs: Spongy organs in the chest that contain the bronchioles and alveoli.
Alveoli: Tiny, balloon-like air sacs at the end of the bronchioles where gas exchange occurs with the surrounding capillaries.
How it works
Inhalation: The diaphragm contracts and moves down, and rib muscles pull the rib cage up and out. This expands the chest cavity, and air is drawn into the lungs.
Gas exchange: In the alveoli, oxygen from the inhaled air passes into the blood in the capillaries. Simultaneously, carbon dioxide, a waste product, passes from the blood into the alveoli to be exhaled.
Exhalation: The diaphragm relaxes, and air is pushed out of the lungs.
Control: The brain regulates the rate of breathing based on the body's need for oxygen and removal of carbon dioxide.
Cellular respiration: The respiratory system's function is directly linked to cellular respiration, which is the process where cells use the inhaled oxygen to produce energy and release carbon dioxide as a byproduct.