What is the primary purpose of the immune/lymphatic system?

The primary purpose of the immune/lymphatic system is to destroy disease-causing toxins and bacteria. This system plays a critical role in the body's defense mechanism, identifying and eliminating potentially harmful pathogens such as viruses, bacteria, and other foreign invaders. The immune system comprises various cells, tissues, and organs that work together to recognize these threats and mount an effective response.

When pathogens invade the body, the immune system activates mechanisms such as phagocytosis, where specific white blood cells engulf and digest the unwanted microorganisms. Additionally, the lymphatic system, which is a significant component of the immune system, aids in the circulation of lymph fluid, which carries immune cells throughout the body to detect and respond to infections.

Other options present different functions that do not relate directly to the primary role of the immune/lymphatic system. Nutrient absorption is primarily handled by the digestive system, the regulation of body temperature involves the integumentary and endocrine systems, and oxygen transportation is the function of the circulatory system, specifically facilitated by red blood cells. Thus, these options highlight important physiological processes but are not connected to the immune/lymphatic system's main purpose.