The integumentary system is the organ system that protects the body from various kinds of damage, such as loss of water or abrasion from outside.[1] The system comprises the skin and its appendages[2][3] (including hair, scales, feathers, hooves, and nails). The integumentary system has a variety of functions; it may serve to waterproof, cushion, and protect the deeper tissues, excrete wastes, and regulate temperature, and is the attachment site for sensory receptors to detect pain, sensation, pressure, and temperature.