Human Respiratory System - Respiratory Mechanism

2. Respiratory Mechanism
          Respiratory Mechanism - In the respiratory system, occurs the respiratory mechanism. Based on the type of active muscles, breathing human being divided into two, breathing chest and abdominal breathing.

   A.   Breathimg Chest
               Muscle which active in the chest breathing is a muscle and ribs.

Diagram Abdomial Breathing Mechanism

          1) Inhalation
          External intercostal muscle contraction, ribs lifted up, volume of the chest cavity enlarges, lungs air pressure decreases, the air from outside go into the lungs.

          2) Exhalation
          External intercostal muscle relaxation, ribs fell back, chest cavity volume deflate, lungs air pressure increase, the air out of the lungs.

   B.   Abdominal Breathing
             Muscle which active in the abdominal breathing is diaphragm muscle.

Diagram Abdomial Breathing Mechanism

          1) Inhalation
         Diaphragm muscle contraction, so diaphragm which initially curved, turned into flat, volume of the chest cavity enlarges, lungs, air pressure decreases, the air from outside go into the lungs.

          2) Exhalation
          Diaphragm muscle relaxation, so diaphragm which initially flat, curved back, chest cavity volume deflate, lungs air pressure increase, the air out of the lungs.

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