Biology, asked by saipm1, 2 months ago

PORS
1 Movement of air out of the lungo
2) Ribs move upward and outward
ATS
3) Expansion of thoracic cavity
4) Movement of diaphragm away from the lung,​

Answers

Answered by Speedy75
1

Answer:

1. The movement of air in and out is called respiration.

2.Contraction of the external intercostal muscles moves the ribs upward and outward, causing the rib cage to expand, which increases the volume of the thoracic cavity. ... Instead, the elasticity of the lung tissue causes the lung to recoil, as the diaphragm and intercostal muscles relax the following inspiration.

3.During the process of inhalation, the lung volume expands as a result of the contraction of the diaphragm and intercostal muscles (the muscles that are connected to the rib cage), thus expanding the thoracic cavity. Due to this increase in volume, the pressure is decreased, based on the principles of Boyle's Law.

4.The diaphragm is a thin skeletal muscle that sits at the base of the chest and separates the abdomen from the chest. It contracts and flattens when you inhale. This creates a vacuum effect that pulls air into the lungs. When you exhale, the diaphragm relaxes and the air is pushed out of the lungs.

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