the integumentary system
DESCRIPTION
The Integumentary System. What Covers You. Integumentary System. The Integumentary System includes all the external coverings of the body including the skin, nails and hair. The skin is the largest organ in your body. Functions of the Skin. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/1.jpg)
The Integumentary System
What Covers You
![Page 2: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/2.jpg)
Integumentary SystemThe Integumentary System includes all the
external coverings of the body including the skin, nails and hair.
The skin is the largest organ in your body.
![Page 3: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/3.jpg)
Functions of the SkinSkin covers your bones and muscles and
protects them from the external environment.
It protects the cells and tissues under the skin from damage.
Skin is the first line of defense against dirt, bacteria, viruses, and other substances that might enter the body.
![Page 4: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/4.jpg)
Functions of the Skin (cont.)Sensory receptors are special cells in your
skin that detect texture and temperature and sense pain.
The more sensory receptors there are in an area of skin, the more sensitive it is.
![Page 5: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/5.jpg)
Functions of the Skin (cont.)Skin helps control body temperature.Skin lowers your body temperature by
producing sweat, which evaporates and allows excess thermal energy to leave the body.
Skin also lowers body temperature by releasing thermal energy from blood vessels.
If your skin is exposed to sunlight, it can make vitamin D which helps it absorb calcium and phosphorous to promote bone growth.
![Page 6: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/6.jpg)
Functions of the Skin (cont.)The skin helps to eliminate waste
products produced by normal cellular processes.
Water, salts, and other waste products are removed through the pores.
![Page 7: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/7.jpg)
Structures of the Skin: EpidermisThe epidermis is the outermost layer of skin
and the only layer in direct contact with the outside environment.
Cells of the epidermis are constantly shed and replaced by new cells.
The epidermis produces melanin, which is a pigment that protects the body by absorbing some of the Sun’s damaging ultraviolet rays.
![Page 8: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/8.jpg)
Structures of the Skin: DermisThe dermis is the thick layer of skin beneath the
epidermis that gives skin strength, nourishment, and flexibility.
The dermis contains sweat glands, blood vessels, nerves, hair follicles, and muscles.
![Page 9: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/9.jpg)
Structures of the Skin: Fatty LayerThe fatty layer is the innermost layer of skin
which insulates the body, acts as protective padding, and stores energy.
![Page 10: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/10.jpg)
Skin Injuries: BruisesA bruise is an injury where blood vessels in
the skin are broken, but the skin is not cut or opened.
The broken blood vessels release blood into the surrounding tissue.
![Page 11: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/11.jpg)
Skin Injuries: CutsWhen you break one or more layers of skin, it is
called a cut.The released blood of a cut will usually thicken and
form a scab over the cut which prevents dirt and other outside substances from entering the body.
Skin heals by producing new skin cells that eventually repair the cut.
![Page 12: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/12.jpg)
Skin Injuries: BurnsA burn is an injury to skin caused by contact
with hot objects, extremely cold objects, chemicals, radiation, electricity, or friction.
Burns are classified by the depth of damage to the skin as first-degree, second-degree, or third-degree burns.
![Page 13: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/13.jpg)
Degrees of Burns: First
![Page 14: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/14.jpg)
Degree of Burns: Second
![Page 15: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/15.jpg)
Degree of Burns: Third
![Page 16: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/16.jpg)
Healthy SkinProtecting skin from the ultraviolet rays in
sunlight and eating a balanced diet are two ways to help keep skin healthy.
![Page 17: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/17.jpg)
The Skin and HomeostasisSkin can make vitamin D and protect the
body from outside substances, which helps regulate the body’s internal environment.
Skin and the circulatory system help cool the body when it becomes overheated.
If the body becomes cold, blood vessels constrict and reduce thermal energy loss.
![Page 18: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/18.jpg)
System Working TogetherThe skin, the nervous system, and the
muscular system work together to maintain homeostasis.
![Page 19: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/19.jpg)
Hair & Nails• A hair forms at the bottom of a tiny sac called
a hair follicle. Hair helps protect skin from ultraviolet light and helps regulate body temperature in most mammals.
• A nail grows from living cells in the nail root at the base of the nail. Nails protect the tips of your fingers and toes.
![Page 20: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/20.jpg)
Lesson Review Questions: 1What is the name of the pigment that protects the body by absorbing some of the Sun’s ultraviolet rays?
A. SweatB. Vitamin DC. MelaninD. Skin
![Page 21: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/21.jpg)
Lesson Review Questions: 2A bruise is the result of breaking which of these?
A. EpidermisB. Blood VesselC. DermisD. Scab
![Page 22: The Integumentary System](https://reader036.vdocuments.us/reader036/viewer/2022062501/568164b1550346895dd6bc81/html5/thumbnails/22.jpg)
Lesson Review Questions: 3What is the name of the thick layer of skin beneath the epidermis that gives skin strength, nourishment, and flexibility?
A. MelaninB. Fatty LayerC. Integumentary SystemD. Dermis