Question

What is Name the muscular part situated at the base of the chest cavity ​

Answer 1

Answer:

Diaphragm, dome-shaped, muscular and membranous structure that separates the thoracic (chest) and abdominal cavities in mammals; it is the principal muscle of respiration.The muscles of the diaphragm arise from the lower part of the sternum (breastbone), the lower six ribs, and the lumbar (loin) vertebrae of the spine and are attached to a central membranous tendon. Contraction of the diaphragm increases the internal height of the thoracic cavity, thus lowering its internal pressure and causing inspiration of air.Relaxation of the diaphragm and the natural elasticity of lung tissue and the thoracic cage produce expiration.

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