ANP 1106 Lecture 3: The Integumentary System
6 Mar 2017
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*** any words composed of the following grammatical structure: cutane/o, dermat/o, Derm/o, can be associated with the integumentary system** Hypodermis (superficial fascia) = not part of the skin, hence. Keratinocytes subcutaneous (starting to be internal structure of body) Numerous branching processes for melanin in transferring it to adjacent cells: langerhans cells. Epidermal dendritic cells (think dendrites of neurons = star shaped) Have disc-like sensory nerve endings = touch receptors. Thickness of palm of hand and soles of feet. Accumulate keratohyaline & lamellated granules: stratum spinosum: Web of keratin filaments attached to desmosome. Layers of the dermis: cell types typical of ct: Some mast cells: semi- fluid matrix heavily embedded w/ collagen, elastin. & reticular fibres: richly supplied w/ nerve fibers, blood & lymphatic vessels, also hair follicles, oil &sweat glands, papillary layer: Superficial interwoven mat of ct fibres interspersed w/ blood vessels. Dermal papillae indent overlying epidermis: reticular layer.
