Which of the following is not considered an appendage of the skin?

The lymph node is not considered an appendage of the skin because it is a component of the lymphatic system, which plays a role in immune function and fluid balance in the body. In contrast, hair follicles, sweat glands, and oil glands are all directly associated with the skin and are involved in various skin functions such as thermoregulation, excretion, and protection.

Hair follicles are structures that produce hair, while sweat glands help regulate body temperature through perspiration. Oil glands, or sebaceous glands, secrete sebum that lubricates and protects the skin and hair. These appendages are integral to maintaining skin health and functionality, whereas lymph nodes are located throughout the body and primarily function in the immune response, making them distinct from skin appendages.