This system protects the body and inner organs from harmful outer agents. The integumentary system. There are two layers of skin: Epidermis - This is the top layer of the skin and is made of dead cells.The cells are shed all the time, but new ones are always being made, so people never lose any skin. The integumentary system is an organ system consisting of the skin, hair, nails, and exocrine glands. The integumentary system protects the body, regulates temperature and functions in water transfer. The integumentary system helps regulate body temperature through its tight association with the sympathetic nervous system, the division of the nervous system involved in our fight-or-flight responses. It has a variety of additional functions; it may serve to waterproof, and protect the deeper tissues, excrete wastes, and regulate body temperature, and is the attachment site for sensory receptors to detect pain, sensation, pressure, and temperature. The main function of the integumentary system is to protect the internal organs from any kind of damage. So these two layers along with other components like nails, hair, skin scales, feathers, and hooves, etc. Unlike the other bodily systems throughout the body, the integumentary system is not localized to one area or region of the body; instead, the integumentary system covers the entire body. The functions of the integumentary system are: Protection. Start studying Functions of the Integumentary System. Integumentary System The Integumentary system is defined as “an organ system consisting in the skin, hair, nails, and exocrine glands” (Integumentary System, 1999). Skin is composed of two main layers, the epidermis and dermis. Integumentary System Functions. In fact, the human body has three layers of skin: the epidermis, the dermis, and the subcutaneous layer. Facts About The Six Primary Functions Of The Integumentary System. The intergumentary system is an organ system that is composed of the skin and accompanying structures, such as hair, feathers, hooves, horns, nails, and scales. Integumentary System Functions Protection. The sympathetic nervous system is continuously monitoring body temperature and initiating appropriate motor responses. The integumentary system consists of the largest organ in the body: the skin. The integumentary system is the organ system that helps to maintain the body form and protects the body from damage like abrasions. Just like any other organ system in your body, the integumentary system does accomplish certain functions of vital importance. The integumentary system helps regulate body temperature through its tight association with the sympathetic nervous system, the division of the nervous system involved in our fight-or-flight responses. The integumentary system is the largest organ system of the human body. Skin. It is also an important sensory organ that transmits information about the surrounding world. The skin, a major component of the integumentary system, is the body's largest organ. The skin has many functions, including serving as an enclosing barrier and providing environmental protection, regulating temperature, producing pigment and vitamin D, and sensory perception. The nerve endings in the the skin allow the body to sense temperature changes, pressure, and touch. Anatomically, the skin consists of the following structures: epidermis, basement membrane zone, dermis, appendageal system, and subcutaneous muscles and fat. integumentary system function 3. this system helps keep the body from drying out, provides a natural sunscreen, and acts as storage for fatty tissues necessary for energy, with the aid of sunshine it provides vitamin d, also provides sensory input and unpleasant sensations involving pressure and temperature. 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