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Biology, 26.07.2019 15:00 dudedude4096
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 air is drawn into the lungs. term:
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