Health Sciences 2300A/B Chapter Notes - Chapter 5: Dense Irregular Connective Tissue, Stratum Granulosum, Stratum Spinosum
4 Aug 2017
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Document Summary
Integumentary system: composed of organs such as the skin,hair,oil, sweat glands, nails and sensory receptors. It helps maintain body at constant temperature , protects body and provides sensory info about surrounding environment: most exposed to infection, disease and injury, protective features of the skin. Dermatology: medical specialty that deal with the structure, function an disorders of the skin. Cutaneous membrane(skin) covers external surface of the body and is the largest organ. Skin consists of two main parts: superficial thinner portion. Deep in dermis = subcutaneous layer (hypodermis) consists of areolar and adipose tissues (not part of the skin) Tough , arranged in layers, produce keratin, produce lamellar granules (decrease water entry + foreign materials: melanocytes. Develop from neural crest of a developing embryo and produce the pigment melanin. Melanin absorbs damaging uv rays protective veil around nucleus: intraepidermal macrophage cells. Arose from red bone marrow and migrate to epidermis. Immune response against microbes that invade skin: tactile epithelial cells.
