What is the primary function of the immune system?

• A. To help in digestion
• B. To produce hormones
• C. To protect the body from infections and diseases
• D. To facilitate movement

Answer: (C)

The primary function of the immune system is to protect the body from infections and diseases. This system is a complex network of cells, tissues, and organs that work together to defend the body against pathogens, such as bacteria, viruses, fungi, and parasites. The immune response includes the recognition of these foreign invaders, the activation of various immune cells, and the production of antibodies that neutralize threats.

By detecting and targeting harmful substances, the immune system plays a crucial role in maintaining health and preventing illnesses. It also has a memory component, allowing it to respond more aggressively to pathogens encountered previously, which is the basis for how vaccinations work to provide immunity.

The other options do not align with the primary role of the immune system: digestion is primarily managed by the digestive system, hormone production is the function of the endocrine system, and movement is facilitated by the muscular and skeletal systems.