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How do we breathe out?
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How do we breathe out?I want answer from class 7th ncert science book!...
How Do We Breathe Out?
Breathing is an essential process that involves inhaling oxygen and exhaling carbon dioxide. The act of breathing out is known as expiration.
Process of Breathing Out
When we exhale, several steps occur:
  • Diaphragm Relaxation: The diaphragm, a dome-shaped muscle below the lungs, relaxes. This causes the chest cavity to decrease in size.
  • Rib Cage Movement: The rib cage moves inward as the intercostal muscles (muscles between the ribs) relax. This further reduces the volume of the chest cavity.
  • Air Pressure Change: As the chest cavity shrinks, the pressure inside the lungs becomes higher than the atmospheric pressure outside.
  • Air Expulsion: Due to the pressure difference, air is pushed out of the lungs through the trachea and out of the nose or mouth.

Importance of Breathing Out
Exhaling is vital for several reasons:
  • Removal of Carbon Dioxide: It helps remove carbon dioxide, a waste product produced during cellular respiration.
  • Maintaining pH Balance: By expelling carbon dioxide, we help maintain the pH level of our blood, which is crucial for overall health.
  • Regulating Breathing Rate: The body monitors carbon dioxide levels to regulate our breathing rate, ensuring we breathe adequately.

In summary, exhaling is a crucial part of the breathing process, involving the relaxation of the diaphragm and rib muscles, leading to the expulsion of air rich in carbon dioxide. Understanding this process helps us appreciate how our bodies function efficiently.
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How do we breathe out?I want answer from class 7th ncert science book!I want little short answer?
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