Integumentary System

The Integumentary System (pronounced: in-teg-yuh-men-tuh-ree sis-tuhm) is the organ system that protects the body from various kinds of damage, such as loss of water or abrasion from outside. The system comprises the skin and its appendages, including hair, scales, feathers, hooves, and nails.

Etymology

The term "Integumentary" is derived from the Latin word integumentum, which means a covering. The term "System" comes from the Latin word systema, meaning a whole compounded of several parts or members.

Structure

The Integumentary System is made up of three main parts: the Skin, the Hair, and the Nails. Each of these components plays a crucial role in protecting the body, regulating temperature, and providing sensory information.

Skin

The Skin is the largest organ of the body and serves as the primary barrier between the internal body and the external environment. It is composed of three layers: the Epidermis, the outermost layer; the Dermis, the middle layer; and the Hypodermis, also known as the subcutaneous layer.

Hair

Hair serves a variety of functions, including protection, regulation of body temperature, and facilitation of evaporation of perspiration. Hair also provides sensory input by transferring air movement information to the skin.

Nails

Nails, both fingernails and toenails, protect the sensitive tips of fingers and toes from physical injury. They also enhance fine-touch sensation and manipulation.

Function

The primary function of the Integumentary System is to act as a barrier. The skin protects the body from external factors such as bacteria, chemicals, and temperature. The system also contains sensory receptors which detect pain, sensation, pressure, and temperature.

Related Terms

External links

Medical encyclopedia article on Integumentary System
Wikipedia's article - Integumentary System

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Integumentary System