GROSS ANATOMY

Detailed explanation-1: -The diaphragm is a thin dome-shaped muscle which separates the thoracic cavity (lungs and heart) from the abdominal cavity (intestines, stomach, liver, etc.). It is involved in respiration, drawing downward in the chest on inhalation, and pushing upward in exhalation.

Detailed explanation-2: -The thoracic diaphragm, or simply the diaphragm (Ancient Greek: , romanized: diáphragma, lit. ‘partition’), is a sheet of internal skeletal muscle in humans and other mammals that extends across the bottom of the thoracic cavity.

Detailed explanation-3: -The diaphragm muscle is of the skeletal or striated type and is the major muscle of ventilation. Accessory muscles of ventilation include the scalene, the sternocleidomastoid, the pectoralis major, the trapezius, and the external intercostals.

Detailed explanation-4: -Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs. Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.

Detailed explanation-5: -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.