The part of anatomy that internally divides the thoracic cavity from the abdominal cavity is the ________.

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The diaphragm is a dome-shaped sheet of muscle that separates the thoracic cavity from the abdominal cavity. It plays a crucial role in breathing by contracting and relaxing to change the volume of these cavities, which helps to draw air into the lungs and expel it out of the body. The mediastinum is a region within the thoracic cavity that contains the heart, major blood vessels, trachea, esophagus, thymus gland, and other structures. The umbilicus is the navel or belly button, which is a scar that marks the site where the umbilical cord was attached to the fetus during gestation. Viscera is a term used to describe the internal organs of the body, especially those located inside the cavities of the trunk (thorax, abdomen, and pelvis).

The Part of Anatomy That Internally Divides the Thoracic Cavity