The Integumentary System is made up of the skin, hair, and fingernails. Since the skin is the largest organ in the body, it makes up most of this system and is also the most important. The skin is made up of three layers: epidermis (outermost layer, protective), dermis (where you’ll find hair roots and sweat glands), and the subcutaneous layer (cushiony, maintains body temperature).
The integumentary system is the system of organs that protects our body from injury. The system is made up of our skin (our heaviest organ), as well as hair, and nails. Animal integumentary systems also include their fur, scales, and/or feathers. The name for the system comes from the latin word “to cover,” integumentum. The system protects inner organs by waterproofing the rest of the body, by providing cushion, by execreting waste, by regulating internal temperatures, and for sensing the outside environment.
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