Question

give a brief information on the topic 'Breathing'​

Answer 1

Breathing, or "external respiration", brings air into the lungs where gas exchange takes place in the alveoli through diffusion. ... Breathing has other important functions. It provides a mechanism for speech, laughter and similar expressions of the emotions

Answer 2

 ⠀⠀⠀ ⠀ ⠀⠀BREATHING

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• Breathing movement (Two phases)
• ① Inspiration,  ⠀② Expiration
• Respiration carried out with the help of muscles called intercostal muscles
• Pair of ribs present b/w of diaphragm
• It consists of muscle fibre which is in the shape of radial and circular
• These fibres are arranged around collagen (circular inelastic sheet)

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 ⠀⠀⠀ ⠀ ⠀INSPIRATION

• Active process (muscle contraction)
• 2 seconds of duration
• Pulls the rib cage up & down
• Muscles of diaphragm contract
• Diaphragm will get flattens
• Air which enters into lungs, inflating the alveoli, until lung's air pressure is equal to the atmospheric pressure

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 ⠀⠀⠀ ⠀ ⠀EXPIRATION

• Passive process (muscle relaxation)
• 3 seconds of duration
• CO2 gas is called exhaled out
• Relax of external intercostal muscles
• Contract of internal intercostal muscles
• Air is forced out of lungs (Due to alveoli and elastic recoil of chest wall)

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