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Definition: This is a sheet of internal skeletal muscle that extends across the bottom of the thoracic cavity. It separates the thoracic cavity containing the heart and lungs, from the abdominal cavity and performs an important function in respiration: as the diaphragm contracts, the volume of the thoracic cavity increases, and the air is drawn into the lungs.

Meaning:___________________________

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Answer:

Meaning: The Diaphragm

mpereira25

Answer:

The thoracic diaphragm, or simply the diaphragm, is a sheet of internal skeletal muscle in humans and other mammals that extends across the bottom of the thoracic cavity.

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