TISSUES Flashcards
group of cells that are similar in structure and function
tissues
study of tissues
histology
covering, lining and glandular tissue of the body
epithelial tissue
4 primary types of tissues
epithelial
connective
muscle
nervous
the surface of the epithelium exposed to the body’s exterior or to a cavity ALSO FREE SURFACE)
APICAL SURFACE
function: absoroption, protection, filtration, secretion
epithelial tissue
the bottom edge of the cell or tissue adjacent to the basement membrane
basal surface
single layer of flattened cells with disc shaped central nuclei and sparse cytoplasm, the simplest of epithelia
simple squamous epithelia
a thin pliable sheet like type of extracellular matrix that provides cell and tissue support
basement membrane
location: kidney glomeruli, air sac lungs, lining heart, blood vessels, and lymphatic vessel, lining of the ventral body cavity SEOSAE
simple squamous epithelia
allows passage of materials by diffusion and filtration in sites where protection is not important; produces lubricating fluid in SEROSAE
simple squamous epithelia
single layer of cube like cells with large, spherical central nuclei
simple cuboidal epithelium
secretion and absorption
simple cuboidal epithelium
loc: kidney tubules, ducts, secretory portions of small glands, ovary surface
simple cuboidal epithelium
function: secretion, particularly of mucus by ciliary action
pseudostratified columnar epithelium
single layer of tall cells with round to oval nuclei; some cells bear cilia; layer may contain mucus secreting unicellular glands (GOBLET CELLS)
simple columnar epithelium
function: absorption, secretion of mucus, enzymes and other substances; ciliated type propels mucus (OR REPRODUCTIVE CELLS) by ciliary action
simple columnar epithelium
location: non ciliated type lines most of the digestive tract (STOMACH TO ANAL CANAL), gallbladder, and excretory ducts and some glands; ciliated variety lines small bronchi, uterine tubes, and some regions of the uterus
simple columnar epithelium
single layer of cells of different heights, some not reaching the free surface; nuclei seen at different levels; may contain mucus secreting goblet and bear cilia
pseudostratified columnar epithelium
protects underlying tissues in areas subjected to abrasion
stratified squamous epithelium
location: non ciliated type in male’s sperm carrying ducts and ducts of large glands; ciliated variety lines the trachea most of the upper respiratory tract
pseudostratified columnar epithelium
thick membrane composed of several cell layers; Basal cells are cuboidal or columnar and metabolically active; surface cells are flattened (squamous); in the keratinized type, the surface cells are full of keratin and dead; basal cells are active in mitosis and produce the cells of more superficial layers
stratified squamous epithelium
location: nonkeratinized type forms the moist linings of the esophagus, mouth, and vagina; keratinized variety forms type epidermis of the skin, a dry membrane
stratified squamous epithelium
generally 2 layers of cubelike cells
stratified cuboidal epithelium
location: largest ducts of sweat glands, mammary glands, and salivary glands
stratified cuboidal epithelium
several cell layers; basal cells usually cuboidal; superficial cells elongated and columnar
stratified columnar epithelium
protection, secretion
stratified columnar epithelium
location: rare in the body; small amounts in male urethra and in large ducts of some glands
stratified columnar epithelium
resembles both stratifies squamous and stratified cuboidal; basal cells cuboidal or columnar; surface cells dome shaped or squamous like depending on degree of organ stretch
transitional epithelium
stretches ready and permits distension of urinary organ by contained urine
transitional epithelium
location: lines the ureters, bladders, and part of the urethra
transitional epithelium
*connects body parts
*found anywhere in the body’
*consists of living cells surrounded by extracellular matrix
connective tissue
cell, collagen, other fiber
loose connective tissue
fat droplets, cell nucleus
adipose tissue
wbc, rbc, plasma
blood