What does the Integumentary system consist of?

• A. Muscles and bones only
• B. Skin, hair, nails, glands, and nerves
• C. Cardiovascular and respiratory organs
• D. Digestive and endocrine systems

Answer: (B)

The integumentary system is primarily concerned with protecting the body and consists of several key components that serve various functions. It includes the skin, which is the largest organ and acts as a barrier to the external environment, preventing water loss and protecting against pathogens. Additionally, hair and nails are considered derivatives of the skin; they provide insulation, protection, and enhance sensory functions. The system also includes various glands (such as sweat and sebaceous glands) that help regulate body temperature and secrete oils, as well as nerve endings that contribute to the sensory perception of touch, pressure, and pain. This comprehensive nature of the integumentary system highlights its critical role in maintaining overall homeostasis and defending the body against environmental threats.