EVERYDAY SCIENCE

Detailed explanation-1: -The thoracic cage and walls enclose this cavity and its structures, and play an essential role in pulmonary ventilation. The diaphragm and a variety of other muscles are also involved in the process of ventilation. The action of breathing is tightly controlled by the respiratory centre located inside the brain stem.

Detailed explanation-2: -Your lungs make up a large part of your respiratory system, which is the network of organs and tissues that allow you to breathe. You have two lungs, one on each side of your chest, which is also called the thorax.

Detailed explanation-3: -Diaphragm. The diaphragm is the major muscle responsible for breathing. It is a thin, dome-shaped muscle that separates the abdominal cavity from the thoracic cavity.

Detailed explanation-4: -During expiration, the diaphragm and intercostals relax, causing the thorax and lungs to recoil. The air pressure within the lungs increases to above the pressure of the atmosphere, causing air to be forced out of the lungs.