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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 • Homeostatic Imbalances: • Erythema • Pallor • Jaundice • Bruises

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

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

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

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

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

  13. 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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