Structure Function of Human Skin

Structure Function of Human Skin

Why your skin important? Some people put a lot of time and money to keep their skin. They may use special creams and lotions. While expensive creams may not be necessary, it is a good idea to take care of your skin. He did many things for you, from protecting you from illness to feel your environment.
your Skin

Did you know that you are seeing the largest organ in your body every day? You wash it, dry it, cover to keep warm, and open it to cool yourself. Yes, your skin is the largest organ of your body. Your skin is part of your integumentary system (Figure below), which is the outer covering of your body. Integumentary System (covering) consisting of skin, hair, and nails.
function Leather

The skin has many important functions. The skin serves to:

     Provides barrier. Skin create organisms that can harm the body out. The skin also stop water from entering or leaving the body.
     Skin as a control body temperature. This is done by creating a sweat (atauperspirasi), a liquid which cools the body as it evaporates.
     Collect information about your environment. Specialized nerve endings of your skin can feel the heat, pressure, cold, and pain.
     Helps the body get rid of some types of waste, which is removed in sweat.
     skin also acts as a sunscreen. A pigment called melanin blocks the sun is not up to the deeper layers of the skin cells, which can be easily damaged by the sun.

Skin structure

Your skin is constantly exposed to the external environment, so that will be cut, scratched, and worn down. You also naturally a lot of shed skin cells every day. Your body replaces damaged or missing skin cells to grow more of them. Did you know that the skin layer you see is really dead? Such as dead cells are shed or disposed of the top layer, they are replaced by cells under their skin.

Two different layers forming the skin epidermis and dermis (Figure below). Layer of fat located under the dermis, but not part of your skin.
structure of human skin

The skin consists of two layers, the epidermis above and below the dermis. Tissue under the dermis called the hypodermis, but not part of the skin.

epidermis

The epidermis is the outermost layer of the skin. He formed a layer of waterproof, protective wrap over the body surface. Although the upper layers of the epidermis is only about as thick as a piece of paper, it consists of 25 to 30 layers of cells. The epidermis also contains cells that produce melanin. Melanin is the pigment that gives skin and brownish color their hair. The cells that produce melanin found in the lower layers of the epidermis. The epidermis has no blood vessels. The lower part of the epidermis receives blood by diffusion from the blood vessels of the dermis.

dermis

The dermis is the layer of skin beneath the epidermis directly. It is made of tough connective tissue. The dermis contains hair follicles, sweat glands, oil glands, and blood vessels (picture above). The dermis also have many nerve endings that provide the sense of touch, pressure, heat, and pain.

Did you ever notice how your hair stand up when you are cold or scared? Small muscles in the dermis pull on the hair follicles which causes the hair to stand up. The resulting small bumps on the skin that is commonly called "creeps" (picture below).
dermis

Shudder caused by the small muscles in the dermis of interest in the hair follicles, causing hair to stand upright.

Oil glands and sweat glands

Glands and hair follicles open out into the epidermis, but they started in the dermis. Oil glands (picture above) release, or release an oily substance called sebum, into the hair follicle. Hair sebum is "waterproofs" and the skin surface to prevent them from drying out. It can also stop the growth of bacteria on the skin. It is odorless, but the breakdown of sebum by the bacterium can cause odor. If the oil glands become connected and infected, will develop into acne. Up to 85% of teenagers get acne, which usually disappears in adulthood. Frequent washing can help reduce the amount of sebum on the skin.

Sweat glands (picture above) is open to the surface of the skin through the pores of the skin. They are found throughout the body. Evaporation of sweat from the skin surface helps to lower skin temperature. Skin also remove excess water, salts, and other wastes in sweat.

vocabulary

     dermis: dermal layer directly below the epidermis; made of tough connective tissue.
     epidermis: the outermost layer of the skin.
     Integumentary system: covers the outside of your body, including the skin, hair, and nails.
     Melanin: brownish pigment that gives skin and hair their color.
     perspiration: Sweat, made almost entirely of water, with small amounts of other chemicals such as ammonia, urea, salt, and sugar.
     sebum: oily substance secreted in the skin.
     sweat glands: small glands that secrete sweat.