Mechanism of breathin in human
Answers
breathing in man is controlled by the internal inter coastal and external inter coastal muscles which work
antangonistically
INHALATION)
the internal muscles relax and external contract
the ribcage moves upward andoutward
the diaphragm contracts and flattens
the volume of the chestcavity increases and pressure reduces below atmospheric pressure
the higher atmospheric pressure forces in air in the lungs through the nostrils then to trachea finally to lungs
IN EXHALATION
the internal muscles contract and external relax
ribcage moves downward and inward
the diaphragm relaxes and forms a dome shape
the volume of chest cavity decreases and pressure increases above atmospheric pressure
the increased press us forces out carbondioxide out through the lungs hence causing the lungs to deflate