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The Anatomy of the Integumentary System-Skin

The Anatomy of the Integumentary System-Skin. General Info……. Skin has 2 layers Epidermis - outer layer Dermis – inner layer Has Sweat glands that excrete sweat through the pores. Sweat is made up of urea, salts, and water. It is the body’s first line of defense!

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The Anatomy of the Integumentary System-Skin

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  1. The Anatomy of the Integumentary System-Skin

  2. General Info…….. • Skin has 2 layers • Epidermis - outer layer • Dermis – inner layer • Has Sweat glands that excrete sweat through the pores. • Sweat is made up of urea, salts, and water. • It is the body’s first line of defense! • It is the largest organ of the body.

  3. Epidermis • Contains thin outer layer of dead skin cells called the cuticle . • This is the layer that you see everyday. • When you complain about being”ashy”, it is because this layer of dead skin cells is very rough and raggedy. • Most of the “dust” you see around your house is made up of dead skin cells! • Under the cuticle is another layer of living epithelial cells that make up the rest of the epidermis.

  4. Dermis • Thick layer under the epidermis • Contains blood vessels • Oil glands • Sweat glands • Hair follicles • Fat tissue • Nerves • Connective tissue

  5. When you sweat, heat leaves the body through your pores. When the sweat hits the outer surface of the skin, it is cooled by the air. This lowers your body temperature. The skin also helps control body temperature- Homeostasis!

  6. The Amazing Body- Skin

  7. Use the following vocabulary to label the diagram: hair shaft, oil (sebaceous)gland, fat cells, erector pili muscle, blood vessels, nerve endings, epidermis, dermis, cuticle, epithelial cells, hair follicle, sweat gland, connective tissue

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