Which organ system is NOT involved in thermoregulation?

Thermoregulation is primarily the process through which the body maintains its core internal temperature. This involves several organ systems working together to either dissipate heat or generate warmth, depending on the environmental conditions.

The lymphatic system is not directly involved in the processes of thermoregulation. Its primary functions include maintaining fluid balance in the body, absorbing digestive fats, and providing immune responses through lymphatic vessels and nodes. It does not play a significant role in temperature regulation.

In contrast, the respiratory system contributes to thermoregulation through heat exchange during breathing, while the cardiovascular system regulates blood flow and redistributes heat throughout the body. The endocrine system helps control metabolism and hormone levels, which can influence body temperature regulation. Therefore, while the other systems actively participate in thermoregulation, the lymphatic system does not have a direct role in this physiological process.