Mechanism of Breathing
Asked by Niranjan Nir · 2 years ago
Can someone explain the mechanism of breathing in humans?
1 Answer
Mechanism of Breathing: Breathing in humans involves two main processes: inspiration (inhalation) and expiration (exhalation).
Inspiration:
1. Diaphragm contracts and moves downward.
2. Intercostal muscles contract, lifting the ribs upward and outward.
3. This increases the volume of the thoracic cavity, reducing the pressure inside the lungs compared to the atmospheric pressure.
4. Air rushes into the lungs to equalize the pressure.
Expiration:
1. Diaphragm relaxes and moves upward.
2. Intercostal muscles relax, causing the ribs to move downward and inward.
3. This decreases the volume of the thoracic cavity, increasing the pressure inside the lungs compared to the atmospheric pressure.
4. Air is pushed out of the lungs to equalize the pressure.
Inspiration:
1. Diaphragm contracts and moves downward.
2. Intercostal muscles contract, lifting the ribs upward and outward.
3. This increases the volume of the thoracic cavity, reducing the pressure inside the lungs compared to the atmospheric pressure.
4. Air rushes into the lungs to equalize the pressure.
Expiration:
1. Diaphragm relaxes and moves upward.
2. Intercostal muscles relax, causing the ribs to move downward and inward.
3. This decreases the volume of the thoracic cavity, increasing the pressure inside the lungs compared to the atmospheric pressure.
4. Air is pushed out of the lungs to equalize the pressure.
NEET Faculty · 2 years ago
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