Final answer:
The term "cutaneous" pertains to the skin, which is a vital organ of the integumentary system and includes layers like the epidermis and dermis as well as sweat and sebaceous glands.
Step-by-step explanation:
The term "cutaneous" pertains to the skin. Therefore, the answer to the student's question is d) Skin. The skin is a vital organ that is part of the integumentary system, which includes hair and nails as well. It comprises multiple layers including the epidermis, dermis, and subcutaneous fat. Sweat glands and sebaceous glands are associated with the skin and serve to regulate temperature and moisturize the skin, respectively. Additionally, when an individual cuts into the skin and notices blood, it means they have cut into at least the papillary dermis, as the surface layers of the skin do not contain blood vessels. Understanding the structure and function of the skin is crucial for maintaining overall health and appearance.