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Chapter 45 Structure and Function of the Skin

Chapter 45 Structure and Function of the Skin. Healthy Skin. Epidermis Basement membrane Dermis Subcutaneous tissue. Question. Tell whether the following statement is true or false: Subcutaneous tissue is also known as the hypodermis. Answer. True

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Chapter 45 Structure and Function of the Skin

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  1. Chapter 45Structure and Function of the Skin

  2. Healthy Skin • Epidermis • Basement membrane • Dermis • Subcutaneous tissue

  3. Question Tell whether the following statement is true or false: Subcutaneous tissue is also known as the hypodermis.

  4. Answer True Because it lies deep to/underneath/below the dermis, the subcutaneous tissue is also referred to as the hypodermis.

  5. Epidermal Cells • Keratinocytes • Melanocytes • Langerhans cells (macrophages)

  6. Dermis • Provides support and nutrition

  7. Subcutaneous Tissue • Provides support, insulation, energy store

  8. Question In which layer of the skin are most of its structures contained? • Cutaneous • Epidermis • Dermis • Hypodermis

  9. Answer • Dermis The epidermis contains many layers of keratinized squamous epithelium and melanocytes (that produce pigment); the hypodermis contains lots of blood vessels and fatty tissue; the dermis contains most of the stuctures (hair, sweat glands, piloerector muscles, immune cells, blood vessels, and neurons).

  10. Question Tell whether the following statement is true or false: Sebacious glands are a type of sweat gland.

  11. Answer False Sebaceous glands are oil producing glands that are adjacent to hair follicles. Sweat glands include apocrine (these glands also join a hair follicle, producing thicker sweat) and eccrine/merocrine glands. Eccrine sweat glands are the most numerous (you have around 4 million); they open directly to a sweat pore on the skin’s surface.

  12. Manifestations of Skin Disorders • Rashes • Lesions • Blisters • Calluses • Telangiectases • Pruritus (itch)

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