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Answer:
It will decrease their ability to exchange air into and out of the lungs, decreasing gas exchange.
Explanation:
Muscular dystrophy is a rare genetic disease of the skeletal system which occurs early in childhood. Other symptom of muscular dystrophy include impaired learning,muscle stiffness and pain. The rib cage protects and houses the lungs. When the muscle of the rib cages gets impaired then it affects how gases are inhaled and exhaled.
Earth would basically look like the Moon; minus the craters, of course. This is because with no atmosphere to hold all of the Oxygen near the surface, all life would die off fairly quickly.
