Final answer:
Chemotherapy agents often affect rapidly dividing cells in the body, including those of the skin, gastrointestinal tract, and bone marrow, causing side effects such as hair loss.
Step-by-step explanation:
Many types of chemotherapy agents impact sensitive tissues like skin tissues, leading to hair loss. This is because the common approach of all chemotherapy is to decrease the growth rate of cancer cells, which also affects other rapidly dividing cells in the body. The side effects of chemotherapy are seen in bodily systems that have a rapid turnover of cells, which include skin, hair, gastrointestinal, and bone marrow. Healthy, normal cells in these areas can also end up damaged by the chemotherapy, leading to common side effects such as hair loss, nausea, and a weakened immune system.