NEET PG DENTAL EXAM

Detailed explanation-1: -The diaphragm, located below the lungs, is the major muscle of respiration. It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges.

Detailed explanation-2: -A strong muscle, separating the chest cavity and the abdomen, called the diaphragm, contracts and relaxes altering the internal pressure of the chest cavity. When the diaphragm contracts the chest cavity expands and its internal pressure falls.

Detailed explanation-3: -As the diaphragm contracts, it increases the length and diameter of the chest cavity and thus expands the lungs. The intercostal muscles and neck muscles help move the rib cage and thus assist in breathing.