Tissues

Skin and the Integumentary System A.Skin is composed of 2 heavy moulds 1.Epidermis is made of keratinized stratified squamous epithelial tissue, is superficial to the dermis, and is avascular. 2. dermis is chiefly connective tissue, is secret to the carapace, and is vascular * The fight marks collagen (for strength) and expansible (for stretch) fibers. * The skin is thicker on the posterior than the anterior parts of the ashes; thicker on lateral parts of limbs than medial parts. Subcutaneous layer (or hypodermis) is deep to dermis, but is not part of skin. It is mainly fatty tissue B.Layers of epidermis (from deepest to superficial) 1.Stratum Basale (= base) a.has stem carrels that continuously divide by mitosis and interrupt rise to the upper layers; they are technically called keratinocytes. b. resembling contain Merkel cells which are involved in the sensation of come to c.has best crease supply of epidermis d.during embryological dev elopment, some cells move from here to dermis and cast rise to sweat and anoint glands, and also hair follicles. e.also contains melanocytes, which make melanin 2.Stratum Spinosum (= thorny) 3.Stratum Granulosum (granulum = little grain) a.cells are fare one to die because 1)they are making lots of keratin. 2)the burden of each cell breaks down.

4.Stratum Lucidum (clear): Not present in trim down skin: only in fingertips, palms, and soles Extra layers of skin for areas that flummox extra abrasion 5.Stratum Corneum (cornu = horn) a.25 to 30 layers of cells (so more cell layers than any other layer ) b.cells are completely flat fag and dea! d and are continuously shed c.very important obstacle to microorganisms (many, hard layers acts like a wall) d.Callus can orchestrate from these cells; its an abnormal thickening of the epidermis due to word demonstrate to friction. C.The dermis is connective tissue composed of 2 layers: the papillose and the reticular. * It is made of various kinds of loose...If you want to get a seemly essay, order it on our website: OrderCustomPaper.com

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