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Tissues

TermDefinition
4 primary tissue types epithelial, nervous, connective, muscle
epithelial tissue sheets of cells that cover a body surface or line body cavity
two types of epithelial tissue covering and lining, glandular
what are the functions of the epithelial protection, absorption, secretion, exertion, filtration and sensory reception
cellularity of the epithelium packed with cells, only tiny amount of extracellular material between cells
specialized contacts in the epithelium junctions such as tight junctions and desmosomes
polarity of the epithelium cells near the apical surface are diff from the basal surface most apical cells have microvilli
connective tissue support of the epithelium rest on the reticular lamina- which is a layer of collagen fibres
regeneration of epithelium high regeneration, epithelial is expose to friction and surface cells are removed by abrasion
innervated and avascular of the epithelium cells are nourished by diffusion
simple epithelium 1 layer
stratified epithelia 2 or more layer
squamous cell flattered, scale like
cuboidal cell cube, box like
columnar cell tall, column shaped
simple squamous, cuboidal, columnar all single layers.
stratified squamous, cuboidal, columnar all multiple layers ( 2 or more )
connective tissue connects tissues to one another, most abundant, found everywhere in the body
4 main functions of the connective tissue binding and support, protection, insulation, transportation of substances within the body (blood)
3 types of fibres collegen fibres (most abundant) , elastic fibres, reticular fibres
4 blast cell types connective tissue proper (fibroblast), cartilage (chondroblast), bone (osteoblast), blood (hemocytoblast)
describe areolar connective tissue most common type, creates protection, loose arrangement of fibres creates many empty spaces providing a reservoir of water and salts, operates as packing material between other tissues, wraps around blood vessels and nerves
describe adipose connective tissue modified to hold nutrients, adipocytes (fat cells) predominate, found under skin, around kidneys and eyeballs
describe reticular connective tissue resembles areolar tissue but contains only reticular fibres; reticular cells predominate
dense regular connective tissue contains closely packed bundles of collagen fibres that lie parallel to the direction of pull. forms tendons and liagments
dense irregular connective tissue The bundles of collagen fibers are much thicker and not arranged regularly, like the dense regular connective tissue. Major cell type is fibroblast. Found in the dermis of the skin, capsules of joints.
Definition of cartilage Tough but flexible, this tissue is a vascular and devoid of nerve fibres. Primarily composed of collagen fibers. Chondroblast are the predominant cell type of cartilage.
define Hyaline cartilage Most abundant, supports tip of nose, attaches rims to sternum, forms most of the larynx , trachea and bronchial tubes.
Defined elastic cartilage Nearly identical to hyline, contains more elastin fibres, external ear and epiglottis is where this cartilage is located
Defined fibrocartilage Rows of chondrocytes, alternating with the collagen fibres. Found in intervertebral discus
Covering in lining of membranes are: Cutaneous membranes, mucous membranes, and serious membranes
Cutaneous membranes are: Keratinized stratified squamous epithelium (epidermis) attached to a thick layer of connective tissue (dermis); this membrane is dry
Mucous membranes are: This membrane generally isn't opening to the outside(digestive respiratory your genital tracks) , moist membranes bathed by secretions, may secrete mucus,
Serious membranes are: Found in the closed ventral body cavity, simple squamous epithelium resting on the thin areolar connective tissue,
Created by: carolinegurnsey