As a person ages, the rib cage becomes fixed and less able to expand and contract. This causes a condition called "barrel chest," which actually adds to the efficiency of breathing.

Question

Quizplus · Accepted Answer

Barrel chest is caused by a different condition, such as emphysema or chronic bronchitis, and is not an expected result of aging. In fact, a fixed and less expandable rib cage can lead to difficulties with breathing and decreased lung function.

As a Person Ages, the Rib Cage Becomes Fixed and Less