The Integumentary System More Than Skin Deep

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

TEKS The student knows that, at all level of nature, living systems are found within other living systems, each with its own boundary and limits. The student is expected to: The student knows that, at all level of nature, living systems are found within other living systems, each with its own boundary and limits. The student is expected to: (A) interpret the functions of systems in organisms including circulatory, digestive, nervous, endocrine, reproductive, integumentary, skeletal, respiratory, muscular, excretory, and immune; (B) compare the interrelationships of organ systems to each other and to the body as a whole;

Engage Fingerprinting 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 of your three classmates? Do any of your fingerprints have the same pattern as those 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 patterns seen on your fingertips? Where else on your body might you have the kinds of skin 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 other functions of our integument? Our skin can help identify who we are, but what are some other functions of our integument?

Explore Human Epidermal Cells Lab Human Epidermal Cells Lab MD Anderson Sun SAFETY MD Anderson Sun SAFETY

Explain 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 the surface of the skin? Which layer is on the top closest to the surface of the skin? What is the deepest layer of the skin called? What is the deepest layer of the skin called?

Explain: What is the Integument? Explain: What is the Integument? The outer most covering of the animal body. The outer most covering of the animal body. Largest organ of the body. Largest organ of the body. Covers the entire visible surface of the body including the SKIN, as well as, hair, fingernails, and toenails Covers the entire visible surface of the body including the SKIN, as well as, hair, fingernails, and toenails

What are the 2 layers of skin? Skin has 2 main layers Skin has 2 main layers –Epidermis (outer layer) –Dermis (inner layer) (inner layer)

Two Layers of Skin Epidermis Epidermis –Layer of skin above the dermis. –Part that sunburns, tans, wrinkles and freckles –Epithelial cells-dead Epithelial –Squamous cells between epithelial and basal –Contains Basal Cells-Base of this layer Contains –Melanocytes – make melanin that produces a tan, makes freckles and moles.

Two Layers of Skin Dermis Dermis –Deepest layer of skin –Contains blood, lymphatic vessels, nerves, nerve endings, sweat glands, oil glands and hair follicles

The Skin and Its Functions Protection for underlying tissues Protection for underlying tissues Sense organ Sense organ Maintains a balance of chemicals in the body Maintains a balance of chemicals in the body Regulates your body temperature to maintain homeostasis Regulates your body temperature to maintain homeostasis –Hot - sweat –Cold – shiver

What are the parts? A. Basal Cells/ Melanocytes A. Basal Cells/ Melanocytes B. muscle B. muscle C. sebaceous gland C. sebaceous gland D. hair shaft D. hair shaft E. epidermis E. epidermis F. dermis F. dermis G. subcutaneous tissue G. subcutaneous tissue H. fat H. fat I. arterial blood vessel I. arterial blood vessel J. sweat gland J. sweat gland K. hair follicle K. hair follicle

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