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Tissues
| Term | Definition |
|---|---|
| 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
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