The Integumentary The Integumentary SystemSystem

More Than Skin DeepMore Than Skin Deep

TAKSTAKS

• TAKSTAKS Objective 2Objective 2 – The student will – The student will demonstrate an understanding demonstrate an understanding of living systems and the of living systems and the environment.environment.

TEKSTEKS

• The student knows that, at all level of nature, The student knows that, at all level of nature, living systems are found within other living living systems are found within other living systems, each with its own boundary and limits. systems, each with its own boundary and limits. The student is expected to:The student is expected to:

(A)(A) interpret the functions of systems in organisms interpret the functions of systems in organisms including circulatory, digestive, nervous, including circulatory, digestive, nervous, endocrine, reproductive, endocrine, reproductive, integumentaryintegumentary, , skeletal, respiratory, muscular, excretory, and skeletal, respiratory, muscular, excretory, and immune;immune;

(B)(B)compare the interrelationships of organ systems compare the interrelationships of organ systems to each other and to the body as a whole;to each other and to the body as a whole;

EngageEngage

FingerprintingFingerprinting• Are your fingerprints the same on your five fingers?Are your fingerprints the same on your five fingers?• Do any of your fingerprints have the same pattern as those Do any of your fingerprints have the same pattern as those

of your three classmates?of your three classmates?• Why is a fingerprint a good way to identify a person?Why is a fingerprint a good way to identify a person?• Where else on your body might you have the kinds of skin Where else on your body might you have the kinds of skin

patterns seen on your fingertips?patterns seen on your fingertips?• What would happen if you were missing an organ? What would happen if you were missing an organ? • Would you consider skin to be an organ? Why or why not? Would you consider skin to be an organ? Why or why not? • Our skin can help identify who we are, but what are some Our skin can help identify who we are, but what are some

other functions of our integument?other functions of our integument?

ExploreExplore

• Human Epidermal Cells LabHuman Epidermal Cells Lab

• MD Anderson Sun SAFETYMD Anderson Sun SAFETY

ExplainExplain

• What is skin?What is skin?• What are the two layers of the skin?What are the two layers of the skin?• Which layer is on the top closest to Which layer is on the top closest to

the surface of the skin?the surface of the skin?• What is the deepest layer of the skin What is the deepest layer of the skin

called?called?

Explain: What is the Explain: What is the Integument?Integument?

• The outer most covering of the The outer most covering of the animal body.animal body.

• Largest organ of the body.Largest organ of the body.

• Covers the entire visible surface of Covers the entire visible surface of the body including the SKIN, as well the body including the SKIN, as well as, hair, fingernails, and toenailsas, hair, fingernails, and toenails

What are the 2 layers of What are the 2 layers of skin?skin?• Skin has 2 Skin has 2

main layersmain layers– Epidermis Epidermis

(outer layer)(outer layer)– Dermis Dermis

(inner layer)(inner layer)

Two Layers of SkinTwo Layers of Skin

• EpidermisEpidermis– Layer of skin above the dermis.Layer of skin above the dermis.– Part that sunburns, tans, wrinkles and frecklesPart that sunburns, tans, wrinkles and freckles– Epithelial cells-deadEpithelial cells-dead– Squamous cells between epithelial and basalSquamous cells between epithelial and basal– Contains Basal Cells-Base of this layerContains Basal Cells-Base of this layer– Melanocytes – make melanin that produces a Melanocytes – make melanin that produces a

tan, makes freckles and moles.tan, makes freckles and moles.

Two Layers of SkinTwo Layers of Skin

• DermisDermis– Deepest layer Deepest layer

of skinof skin– Contains blood, Contains blood,

lymphatic lymphatic vessels, nerves, vessels, nerves, nerve endings, nerve endings, sweat glands, sweat glands, oil glands and oil glands and hair follicleshair follicles

The Skin and Its FunctionsThe Skin and Its Functions• Protection for underlying tissuesProtection for underlying tissues

• Sense organSense organ

• Maintains a balance of chemicals in Maintains a balance of chemicals in the bodythe body

• Regulates your body temperature to Regulates your body temperature to maintain homeostasismaintain homeostasis– Hot - sweatHot - sweat– Cold – shiverCold – shiver

What are the parts?What are the parts?• A. Basal Cells/ A. Basal Cells/

MelanocytesMelanocytes

• B. muscle B. muscle

• C. sebaceous glandC. sebaceous gland

• D. hair shaft D. hair shaft

• E. epidermis E. epidermis

• F. dermisF. dermis

• G. subcutaneous G. subcutaneous tissue tissue

• H. fatH. fat

• I. arterial blood vessel I. arterial blood vessel

• J. sweat glandJ. sweat gland

• K. hair follicleK. hair follicle

ElaborateElaborate

• Burn BrochuresBurn Brochures