Question

2. What is the role of the ribs and diaphragm in breathing?​

Answer 1

Answer:

When the lungs inhale, the diaphragm contracts and pulls downward. At the same time, the muscles between the ribs contract and pull upward. This increases the size of the thoracic cavity and decreases the pressure inside. As a result, air rushes in and fills the lungs.

Explanation:

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Answer 2

Explanation:

RIBS MOVE UP DURING INHALATION AND ALLOW THE LUNGS TO INCREASE THEIR VOLUME SO THAT THE OXYGEN CAN COME INSIDE THE LUNGS.

DIAPHRAGM IS A MUSCULAR LAYER BEYOND LUNGS, IT BENDS DOWNWARDS SO THAT LUNGS CAN FILL OXYGEN INSIDE THEM.

AFTER EXHALATION RIBS MOVE DOWN AND VOLUME OF LUNGS DECRESES SO THAT CO2

CAN GO OUTSIDE AND THE DIAPHRAGM BECOMES FLATTEN IN SHAPE AFTER EXHALATION.