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BI 103 2 - o “Running out of hairs” • Drier skin hair...

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BI 103: Integumentary System 16:02     Skin --  Largest Organ (pg. 54) Epidermis: Epithelial tissue o Melanocytes: protect skin from sunlight damage, located at the bottom of  the epidermis Dermis: Connective tissue o Collagen Cells – resist forces o Elastin Fiber Cells – return skin to normal form o Matrix is gel-like filler (water) o Sebaceous Oil Glands – secrete lipid-rich sebum Keeps the skin moist and supple  Hypodermis: Connective tissue Integumentary System Functions Protection Gripping Vitamin D Synthesis Temperature Regulation Sensation o Sensory Neurons: receive information Changes over Time     Puberty: Hormones trigger hair growth, oil production Hair Loss: Hormones (particularly testosterone) 
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Unformatted text preview: o “Running out of hairs” • Drier skin, hair, and nails – reduced oil production • Changes in Hair and Skin Color – related to melanin being replaced by colorless air bubbles o In skin, the remaining melanocytes can increase in size • Wrinkles – reduction of collagen, elastin, and fat Skin Disorders • Rashes: inflammation (fluid accumulates) • Cut/Scratch • Scar – Loose Connective tissue -> Dense Connective tissue • Burns o First Degree – epidermis only o Second Degree – epidermis and dermis o Third Degree – epidermis, dermis, hypodermis • Increased MRSA Infections (methicillin-resistant Staphylococcus aureus) o Staph Infections 16:02 16:02...
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BI 103 2 - o “Running out of hairs” • Drier skin hair...

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