Which function is shared by both the immune system and the integumentary system?

• A. Production of hormones
• B. Synthesis of red blood cells
• C. Protection against pathogens
• D. Regulation of blood glucose

Answer: (C)

Verified step by step guidance

1. Understand the primary functions of the immune system: The immune system is responsible for defending the body against pathogens such as bacteria, viruses, and other harmful microorganisms. It identifies and neutralizes these invaders to maintain health.
2. Understand the primary functions of the integumentary system: The integumentary system, which includes the skin, hair, nails, and associated glands, serves as the body's first line of defense against external threats, including pathogens. It also helps regulate body temperature and prevents water loss.
3. Identify the shared function: Both the immune system and the integumentary system contribute to protection against pathogens. The integumentary system acts as a physical barrier, while the immune system provides a more specialized defense by identifying and attacking pathogens that breach this barrier.
4. Eliminate unrelated options: 'Production of hormones' is primarily associated with the endocrine system, not the immune or integumentary systems. 'Synthesis of red blood cells' occurs in the bone marrow, part of the skeletal system. 'Regulation of blood glucose' is managed by the endocrine system, particularly the pancreas.
5. Conclude the shared function: The correct shared function between the immune and integumentary systems is 'Protection against pathogens,' as both systems work together to prevent and combat infections.