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Chapter 11-01: Anatomy and Physiology in Dermatology

STRUCTURE AND FUNCTION OF THE SKIN

  • Function of skin: The skin is a large, complex organ with a variety of important functions: Mechanical barrier, temperature regulation, fluid balance, immune response

  • Layers of the skin: The skin has three layers: 1) Epidermis, 2) Dermis, and 3) Hypodermis (adipose tissue, sweat glands, blood vessels, lymphatics)

  • Layers of the epidermis: From surface to base – stratum corneum (keratin), stratum lucidum, stratum granulosum, stratum spinosum (desmosomes), and stratum basale

FIGURE 11.1

Structure of the epidermis.

An image shows the eye anatomy. The top image shows the eye. The parts labeled are eyelid, iris, pupil, sclera, lacrimal caruncle, tear duct. The cross sectional view of the eye ball is given below. The parts labeled are lateral rectus muscle, suspensory ligaments, ciliary body and muscle, cornea, iris, pupil, lens, anterior chamber (filled with aqueous humor), posterior chamber, ora serrata, medial rectus muscle, retina, choroid, sclera, optic disc (blind spot), retinal blood vessels, optic nerve, fovea centralis (central depression), mucula lutea, and viteous body (filled with vitreous humor).
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