As the body’s biggest organ, skin protects versus germs, regulates body temperature and permits touch (tactile) sensations. The skin’s key layers incorporate the epidermis, dermis and hypodermis and is susceptible to many problems, including skin cancer, acne, wrinkles and also rashes.


The three layers that skin on peak of muscle tissue.

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What is the skin?

The skin is the body’s biggest organ, made of water, protein, fats and minerals. Her skin protects your body from germs and also regulates human body temperature. Nerves in the skin aid you feeling sensations prefer hot and also cold.

Your skin, in addition to your hair, nails, oil glands and sweat glands, is part of the integumentary (in-TEG-you-MEINT-a-ree) system. “Integumentary” way a body’s external covering.

What are the great of the skin?

Three layers of tissue consist of the skin:

Epidermis, the top layer.Dermis, the middle layer.Hypodermis, the bottom or fat layer.

What go the epidermis (top layer of skin) do?

Your epidermis is the height layer that the skin the you have the right to see and also touch. Keratin, a protein within skin cells, provides up the skin cell and, together with other proteins, sticks with each other to form this layer.The epidermis:

Acts as a security barrier: The epidermis keeps bacteria and germs indigenous entering her body and also bloodstream and also causing infections. It likewise protects against rain, sun and other elements.Makes brand-new skin: The epidermis continuous makes brand-new skin cells. These brand-new cells change the roughly 40,000 old skin cells that your human body sheds every day. You have brand-new skin every 30 days.Provides skin color: The epidermis consists of melanin, the pigment that provides skin that color. The quantity of melanin you have determines the shade of her skin, hair and eyes. World who make more melanin have actually darker skin and may tan much more quickly.

What go the dermis (middle layer of skin) do?

The dermis renders up 90% that skin’s thickness. This center layer the skin:

Has collagen and elastin: Collagen is a protein that provides skin cells solid and resilient. One more protein found in the dermis, elastin, keeps skin flexible. It also helps stretched skin reclaim its shape.Grows hair: The roots of hair follicles attach to the dermis.Keeps friend in touch: Nerves in the dermis tell you when something is too hot to touch, itchy or at sight soft. These nerve receptor also aid you feel pain.Makes oil: Oil glands in the dermis aid keep the skin soft and smooth. Oil likewise prevents her skin from taking in too much water as soon as you swim or get caught in a rainstorm.Supplies blood: Blood ship in the dermis administer nutrients come the epidermis, maintaining the skin great healthy.

What walk the hypodermis (bottom great of skin) do?

The bottom layer of skin, or hypodermis, is the fatty layer. The hypodermis:

Cushions muscles and bones: Fat in the hypodermis protects muscles and also bones native injuries as soon as you fall or are in one accident.Has connective tissue: This tissue connects class of skin come muscles and also bones.Helps the nerves and also blood vessels: Nerves and also blood ship in the dermis (middle layer) obtain larger in the hypodermis. This nerves and blood vessels branch the end to attach the hypodermis come the rest of the body.Regulates body temperature: Fat in the hypodermis keeps friend from acquiring too cold or hot.

What else makes up the skin?

One customs of her skin has about 19 million skin cells and also 60,000 melanocytes (cells the make melanin or skin pigment). It also contains 1,000 nerve endings and 20 blood vessels.

Conditions and also Disorders

What conditions and disorders influence the skin?

As the body’s external protection system, your skin is at threat for assorted problems. These include:


How have the right to I safeguard skin?

You shed collagen and elastin as you age. This reasons the skin’s center layer (dermis) to acquire thinner. Together a result, the skin might sag and also develop wrinkles.

While you can’t stop the aging process, this actions can aid maintain healthy skin:

Apply sunscreen every day (even if you’re mostly indoors). Pick a sunscreen through a broad-spectrum sun protection element (SPF) the at least 30.Don’t tan indoors or outdoors. Tanning causes skin damage. It eras skin and can cause skin cancer.Use tenderness cleansers to to wash your confront in the morning and also at night.Shower regularly and apply moisturizing lotion to stop dry skin.

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Frequently asked Questions

When have to I talk to a doctor?

You should contact your health care provider if friend experience:

Change in size, color, form or symmetry of a mole.Skin transforms like a new mole. A reduced that a household bandage can’t close (that might need stitches).Severe, blistering burns.Signs that skin infections choose red streaks or yellow discharge.Unexplained skin rash or skin condition.

A keep in mind from Cleveland Clinic

As the body’s largest organ, her skin dram a an important role in protecting your body indigenous germs and the elements. That keeps your body in ~ a comfortable temperature, and nerves in ~ the skin administer the feeling of touch. This outside body covering deserve to have serious troubles like skin cancer, also as more common issues like acne and also skin rashes. Your health care provider have the right to offer tips to help keep skin healthy.