The major job of the Integumentary The major job of the Integumentary System is protection of the body’s insides.System is protection of the body’s insides.

The system protects the body from, The system protects the body from, dehydration, over heating, or freezing.dehydration, over heating, or freezing.

The major Organ is the skin, which is the The major Organ is the skin, which is the Integumentary system itself. Integumentary system itself.

The skin covers and protects everything The skin covers and protects everything that is inside of us. Without our skin all that is inside of us. Without our skin all of our body parts would be hanging out.of our body parts would be hanging out.

Thermoregulation is a function which is Thermoregulation is a function which is evaporation of sweat from your body, evaporation of sweat from your body, and the regulation of blood flow. and the regulation of blood flow.

The skin tries to keep our body at a 98The skin tries to keep our body at a 98oo F.F.

The skin is made up of three layers. The layer we see is The skin is made up of three layers. The layer we see is called the epidermis. It is made up of dead cells. At the called the epidermis. It is made up of dead cells. At the bottom of the epidermis, new skin cells are forming. bottom of the epidermis, new skin cells are forming. When cells are ready, they start to move upward the top When cells are ready, they start to move upward the top of the epidermis. As the newer cells continue to move of the epidermis. As the newer cells continue to move up, older cells near the top die and rise to the surface of up, older cells near the top die and rise to the surface of the skin.the skin.

The second layer of the skin is called the dermis. It The second layer of the skin is called the dermis. It contains blood vessels, nerves, muscles, oil and sweat contains blood vessels, nerves, muscles, oil and sweat glands, and other structures.glands, and other structures.

The third layer is called the fatty layer. It insulates the The third layer is called the fatty layer. It insulates the body. It is where the fat is deposited when a person gains body. It is where the fat is deposited when a person gains weight.weight.

5 % of the epidermis makes a substance called melanin. 5 % of the epidermis makes a substance called melanin. It gives you the color of your skin.It gives you the color of your skin.

Vitamin D production in skin is the precursor molecule in Vitamin D production in skin is the precursor molecule in skin. skin.

The skin offers a thick layer that covers the whole body The skin offers a thick layer that covers the whole body for protection. for protection.

An advantage of the skin is, when An advantage of the skin is, when you get a wound such as a scrape you get a wound such as a scrape or cut on the skin, it will seal and or cut on the skin, it will seal and heal back together overtime.heal back together overtime.

But sometimes if a cut is too deep But sometimes if a cut is too deep you’ll have to go to a doctor and get you’ll have to go to a doctor and get stitches. Or sometimes the doctor will stitches. Or sometimes the doctor will put a special glue on the cut and over put a special glue on the cut and over time to glue will dissolved.time to glue will dissolved.

The system protects your body from The system protects your body from bacteria as well. It creates a barrier bacteria as well. It creates a barrier to viruses and bacteria. to viruses and bacteria.

The system provides removal of dead The system provides removal of dead cells and sweat from your body. cells and sweat from your body.

• The skin is needed for survival The skin is needed for survival because the skin plays a big role in because the skin plays a big role in homeostasis.homeostasis.

• The skin has a big part in helping The skin has a big part in helping protect your body, keeping regulation protect your body, keeping regulation temperatures and is responsible for temperatures and is responsible for absorption. absorption.

• The skin also is also responsible for The skin also is also responsible for sensory reception. (which is our skins sensory reception. (which is our skins senses!) senses!)

• The skin supports the excretory The skin supports the excretory system in the removal of waste. system in the removal of waste. There are many surface level wastes There are many surface level wastes that are removed from the skin, such that are removed from the skin, such as skin, hair, and finger and toenails. as skin, hair, and finger and toenails.

There are many diseases and There are many diseases and disorders. One of the common ones disorders. One of the common ones is Skin Cancer.is Skin Cancer.

Skin cancer is a malignant tumor Skin cancer is a malignant tumor that grows in the skin cells, when that grows in the skin cells, when too much Ultraviolet radiation from too much Ultraviolet radiation from the sun comes in contact with the the sun comes in contact with the skin.skin.

Another disease that is common is Another disease that is common is Basal Cell Carcinoma. It is usually Basal Cell Carcinoma. It is usually looks like a small, fleshy bump on looks like a small, fleshy bump on the head, neck, or hands. It is the head, neck, or hands. It is caused the same way as skin cancer. caused the same way as skin cancer.

Everybody who comes to a certain Everybody who comes to a certain age starts to see these red bumps on age starts to see these red bumps on their faces. Those red bumps are their faces. Those red bumps are called Acne.called Acne.

Types of Skin cancers

Acne occurs when your Acne occurs when your skins oil glands start to skins oil glands start to make too much oil. It then make too much oil. It then gets clogged with oil, dead gets clogged with oil, dead skin, and bacteria.skin, and bacteria.

Psoriasis can be a genetic Psoriasis can be a genetic disease. It is a disease where disease. It is a disease where the cells of the epidermis the cells of the epidermis are created at a faster rate. It are created at a faster rate. It causes thick skin to elbow causes thick skin to elbow and knees.and knees.

The picture on the left The picture on the left shows a person with acne. shows a person with acne. Then the acne is cleared Then the acne is cleared from her face.from her face.

The Vocabulary.

Sweat- Moisture excuded through the pores of the skin.Skin- The thin layer of tissue forming the natural outer covering of the body of the body of a person or animal. Muscle- A band or bundle of fibrous tissue in a human body. Nerves- one or more bundles of fibers forming a part of a system that conveys impulses of sensation and motion.

Oil gland- A sebaceous gland that secretes sebaceous matter.

Hair- Threads of cell that develop from the epidermis.

Nails- Modification of the epidermis, composed of hard keratin.

Fat tissue- At a loose connective tissue composed of adiposities.

Psoriasis- A common chronic, inflammatory skin disease that is characterized by scaly patches.Dehydration- An abnormal loss of water from the body especially from illness or physical exertion (a lot of work).Dermis- skin layer below the epidermis that contains blood vessels, nerves, oil, and sweat glands and other structures. Melanin- Makes a substance that gives you the color of the skin.

Resources:Resources: www.kidsheath.org www.kidsheath.org www.biology4kids.comwww.biology4kids.com NYC Glencoe textbookNYC Glencoe textbook www.jeffersonhospital.orgwww.jeffersonhospital.org www.science.netwww.science.net www.k12station.comwww.k12station.com www.expertspace.comwww.expertspace.com www.biologycorner.comwww.biologycorner.com www.sciencebob.comwww.sciencebob.com www.rapidlearningcenter.com www.rapidlearningcenter.com

Backgrounds found by Amy WuBackgrounds found by Amy Wu