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layers of closely spaced cells that cover organ surfaces form glands, and serve for protection, secretion, and absorption. Inner lining of digestive tract
With more matrix than cell volume, often specialized to support and bind together and protect organs
3 embryonic germ layers and some adult tissues derived from each
Ectoderm(outer layer), Endoderm(inner layer), and Mesoderm(more loosley organized cells.
Loosely organized cells..eventually turns into gelatinous tissues..rise to muscle, bone, bld
8 types of Epithelium
Simple squamous Epithelia, Simple Cubodial Epithelium, Simple Columnar Epithelium,Simple Pseudostratified ,Stratified Squamous Epithelium, Stratifed Cubodial Epithelium,stratified columar epithelium, Transitional
cubodial shape.basement memebrane,liver, thryoid, absorption and secretion production of protective mucous coat
Simple Columnar Epithelium
single layer of tall narrow cells, inner linning of stomach intestines, gallbladder, uterus, and uterine tubes, some kidney tubles,absorption, secretion ofmucus and other products, movement of egg and embryo in uterine tube
Stratified Squamous Epithelium(Keratinized)
Multiple cell layers with cells becoming increasingly flat @ scally toward the surface;surface covered with a layer of ompace dead cells without nuclei, Epidermis, palms and soles are especially heavly keratinized, resists, abrasion, retards water loss through skinn, resists penetration by pathogenies organisms
Stratified Squamous Epithelium(NonKeratinized)
Same as keratinized epithelium but w/0 layer of dead cell. tongue oral mucous, esophagus, anal canal, vagina..
Stratified Cubodial Epithelium
2 or more layers of cells, surface cells square or round, sweat glands ducts, egg-producing vesicles of ovaries, sperm-producing ducts, contributes to sweat secretions, secretions of ovaries, produces sperm
surface cell are rounded, not flatened and oftern buldge @ surface, urinary tract, bladder, duct in umbilical cord..sretches to allow filing or urinary tract
8 functions of connective tissues
Binding of organs,support, physical protection, immune protection, movement, storage, heat production, transport
tendons bind muscle 2 gone. lingamnets gind 1 bone 2 another, fat holds the kidneys and eyes in place. and fibrous tissue binds the skin 2 musle
forms a battle field under the skin and mucous membrane where immune cells can be quickly mobilized against diease agents
6 types of cells found in fibrous connective tissues
Fibroblasts, macrophages, leudocytes(wbc), plasma cells, mast cell, adipocytes(fat cell)
Large, flat cells that often appear tapered at the ends and show slender, /form matrix of the tissue
certain lymphocytes turn into plasma cells when they detect foreign agents. the plasma cells are rearely seen except in the walls of the intestines and inflammed tissues
large rounded cells filled mainly with a droplet of triglycerides, which forces the nucleus and cystoplasm to occupy only a thin layer jus beneath the plasma membrane.
3 types of tissues found in fibrous connective tissue
Collagenous, Elastic fibers, and Reticular fibers
tough & flexible and resist sretching. collegen is about 25% of the body's protein, the most abudant type. white apperance.as seen in tendons
thinner than collagenous fibers,made of protein called elastin, whose recoil like a rubber band.ablitly of the skin, lungs, and arteries to spring back after they are sretched
thin collagen fibers cated with glycoprotein. forma a spongelike framework for such organs as the spleen adn lymph nodes
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