Question

with increasing age, the kidneys decrease in size and have significantly fewer _____. fill in the blank

Explanation:

The question is about the physiological changes in kidneys with aging. In the context of medicine and health (a subfield of Natural Science), as people age, the kidneys undergo structural and functional changes. One key change is a reduction in the number of nephrons (the functional units of the kidneys) along with a decrease in size.

Answer:

nephrons