Muscular dystrophy affects the functioning of skeletal muscle. as this disease advances, it can impair the contraction of the diaphragm and the muscles of the rib cage. what effect will this have on the ability of people with this disease to carry out gas exchange?

They will be unable to breathe and may die of asphyxia if not medicated.

Explanation:

When the diaphragm muscle contracts, the thoracic cavity expands and this creates an area of low pressure compared to the outside environment. This allows air to rush in through the nose into the lungs. When the muscle contracts, the converse occurs. The thoracic cavity contracts creating an area of relatively high pressure. The air in the lungs is pushed out.

Therefore if the muscle is affected, breathing will be difficult leading to asphyxiation.

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.

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