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A&P Chapter 4 Notes

A&P Chapter 4 Notes. Skin and body membranes. Classification of Body Membranes. Epithelial Membranes Cutaneous Mucous Serous Parietal layer Visceral layer Connective Membranes Synovial. Typical Synovial Joint. Integumentary System. Skin (cutaneous membrane) and derivatives

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A&P Chapter 4 Notes

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  1. A&PChapter 4 Notes Skin and body membranes

  2. Classification of Body Membranes • Epithelial Membranes • Cutaneous • Mucous • Serous • Parietal layer • Visceral layer • Connective Membranes • Synovial

  3. Typical Synovial Joint

  4. Integumentary System Skin (cutaneous membrane) and derivatives Mostly protective function Epidermis, dermis, hypodermis

  5. Epidermis • 5 layers (strata) • Stratum basale • Spinosum • Granulosum • Lucidum • Corneum • Avascular • Keratinocytes • Melanocytes

  6. Dermis • “hide” • Collagen, Elastin, Phagocytes • Papillary layer • Dermal papillae • Meissner’s corpuscles • Papillary patterns • Reticular layer • Blood vessels, sweat and oil glands • Pacinian corpuscles

  7. Skin Color • Three pigments contribute to skin color • Melanin • Carotene • Oxygen bound to hemoglobin • **Vitamin D made in presence of the sun** • Homeostatic Imbalances: • Erythema • Pallor • Jaundice • Bruises

  8. Appendages of the Skin • Cutaneous glands • Exocrine glands • Sebaceous glands • Sweat glands • Eccrine • Apocrine • Hairs and hair follicles • Root • Shaft • Hair bulb matrix • Arrectorpili • Nails • Free edge, body, root

  9. Checkpoint What is the top layer of epidermis? What is the serous membrane that surrounds the lungs? What are the structures inside the dermis that give us our fingerprints? What structures detect pressure?

  10. Homeostatic Imbalances of Skin • Infections and Allergies • Athletes foot • Boils • Cold sores • Contact dermatitis • Impetigo • Psoriasis

  11. Homeostatic Imbalances Cont’d • Burns • Rule of nines • 1st degree • 2nd degree • 3rd degree

  12. Severity of Burns 1st degree 2nd degree 3rd degree

  13. Skin Cancer • Basal cell carcinoma • Squamous cell carcinoma • Malignant melanoma • ABCD rule

  14. Developmental Aspects of Skin and Body Membranes • Fetal - Baby • Lanugo • Vernixcaseosa • Milia • Adolescence • Acne • Dermatitis • Old age • Subcutaneous tissue decrease (cold) • Drier skin • Bags and jowls • Alopecia and graying hair (delayed gene)

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