Write short note on the following:Diaphragm.

1.	Write short note on the following:Diaphragm.
Answer» 1. Diaphragm is a muscular partition that divides the thoracic and abdominal cavity. 2. Located at the base of thoracic cage, it is very important in breathing movements. 3. Diaphragm can undergo consecutive upward and downward movements. 4. These movements along with movements of thoracic cage cause rise and fall of the pressure in the thoracic cavity. 5. Rising up of ribs and lowering of diaphragm causes the decrease in air pressure which makes the air to move into the lungs through nose. This is inhalation. 6. When the pressure rises in the thoracic cavity again, the air is given out. This is exhalation. 7. This is caused due to ribs returning to their original position and rising diaphragm. This simultaneously increases the pressure in thoracic cavity.

Answer»

1. Diaphragm is a muscular partition that divides the thoracic and abdominal cavity.

2. Located at the base of thoracic cage, it is very important in breathing movements.

3. Diaphragm can undergo consecutive upward and downward movements.

4. These movements along with movements of thoracic cage cause rise and fall of the pressure in the thoracic cavity.

5. Rising up of ribs and lowering of diaphragm causes the decrease in air pressure which makes the air to move into the lungs through nose. This is inhalation.

6. When the pressure rises in the thoracic cavity again, the air is given out. This is exhalation.

7. This is caused due to ribs returning to their original position and rising diaphragm. This simultaneously increases the pressure in thoracic cavity.

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