Tissues

Skin and the Integumentary System A.Skin is composed of 2 all-important(prenominal) bottoms 1.Epidermis is made of keratinized stratified squamous epithelial tissue, is superficial to the dermis, and is avascular. 2. dermis is primarily connective tissue, is secret to the carapace, and is vascular * The fight marks collagen (for strength) and bendable (for stretch) fibers. * The skin is thicker on the posterior than the anterior parts of the soundbox; 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 fat tissue B.Layers of epidermis (from deepest to superficial) 1.Stratum Basale (= base) a.has stem cadres that continuously divide by mitosis and interrupt rise to the upper layers; they are technically called keratinocytes. b. equivalent contain Merkel cells which are involved in the sensation of theme song c.has best crease supply of epidermis d.d uring embryological development, some cells reincarnate from here to dermis and cast rise to sweat and vegetable oil 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 compute one to die because 1)they are making lots of keratin. 2)the sum of each cell breaks down.

4.Stratum Lucidum (clear): Not present in cut skin: only in fingertips, palms, and soles Extra layers of skin for areas that circumvent 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 break and dead and are continuously shed c.very important prohibition 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 witness to friction. C.The dermis is connective tissue composed of 2 layers: the papillary and the reticular. * It is made of various kinds of loose...If you want to get a becoming essay, order it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay