What is the most important muscle involved in breathing? *
a. Bicep
b. cardiac
c. Gluteus maximus
d. Diapragm

D. Diaphragm

Explanation:

The work of breathing is done by the diaphragm, which is the muscle between the ribs, the muscle(s) in the neck and the abdominal muscles, the diaphragm itself is a sheet of muscle that is the shape of a dome, it separates the chest cavity from the abdomen, and is the most important muscle used for breathing

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