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epithelial tissue and some of connective tissue

four primary types of tissue epithelial, connective, nervous, &muscular tissue
does the covering epithelial tissue
does the controlling nervous tissue
deals with movement. muscular tissue.
does the supporting connective tissue
is a sheet of cells that covers a body surface or lines a body cavity epithelial tissue
forms the boundary between different environments epithelial tissue
helps with protection, absorption, filtration, excretion, secretion, and sensory reception epithelial tissue
is Avascular but innervated (lacks blood supply/ communicates nerve energy to or stimulates through nerves - no blood vessels - diffusion nourishes the cells; nerve fibers are present epithelial tissue
Regenerate quickly – adequate nutrition = rapid cell division epithelial tissue
has closely packed cells cellularity (characteristic of epithelial tissue)
cells are linked by tight junctions and desmosomes Specialized contacts (characteristic of epithelial tissue)
apical and basal surface cells differ in structure and function Polarity (characteristic of epithelial tissue)
is exposed to the body’s exterior or the cavity of an internal organ (microvilli = brush border, cilia) apical surface (characteristic of epithelial tissue)
is the interior surface; new cells arise from this layer basal surface (characteristic of epithelial tissue)
is a thin supporting sheet of glycoproteins functions in diffusion and allows epithelial cells to migrate to heal a wound basal lamina (characteristic of epithelial tissue
extracellular material containing collagen protein fibers reticular lamina (characteristic of epithelial tissue
(basal lamina and reticular lamina) forms a boundary and reinforces the epithelial sheet The basement membrane (characteristic of epithelial tissue
is composed of closely packed cells mostly uniform type. Cells are anchored by a basement membrane. epithelial cells
each tissues has a two part name: first name is what? second name is what? the number of layers present, the shape of the cell.
the number of layers present in cell first name.
the shape of cells. second name.
single layer (responsible for absorption and filtration). simple.
2 or more layers (responsible for protection). stratified.
3 different shapes of cells. cuboidal, columnar, squamous.
flat-scale like cells squamous
box or cube-like, as tall as they are wide. cuboidal
tall and column shaped columnar
cells can be different shapes but they are classified by the? apical layer.
types of epithelium tissues. simple squamous, simple cuboidal, simple columnar, pseudostratified columnar, transitional, stratified columnar, stratified squamous.
squamous-disc shaped, cuboidal-spherical, columnar-elongated top to bottom and close to the cell base. nuclear shape and placement
disc shaped squamous
spherical shaped cuboidal
elongated top to bottom shape and is close to the cell base columnar
Functions absorption, secretion and filtration Simple Epithelial
flattened, little cytoplasm, thin Endothelium- slick, friction reduced lining. Ex: heart, capillaries, lymphatic vessels Simple Squamous
found in serous membranes lining the ventral cavity and its organs Mesothelium
secretion & absorption Ex: kidney tubules & sm. ducts of glands Simple Cuboidal Epithelium-
absoroption and secretion Ex: digestive tract dense microvilli for absorption goblet cells- secrete a protective lubricating mucus Simple Columnar Epithelial Tissue
secretion and absorption - cells vary in height, but all rest on the basement membrane Ex: respiratory tract Pseudostratified Columnar Epithelium
- -widespread, thick, protection. top layer is squamous and deeper layers are cuboidal or columnar. apical surface- keratinzed- rubbed away. Stratified Squamous Epithelial Tissue
Stratified Epithelia- mostly protection, basal cells - divide and push apically stratified squamous epithelial tissue characteristic
rare - found in the lg. ducts of some glands Stratified Columnar Epithelial Tissue
cells are able to change shape and thin from 6 layers to 3 layers thick - lines urinary organs Transitional Epithelial Tissue
A gland consists of 1 or more cells that make and secrete a particular product. glandular epithelial tissue
gland classification has 2 distinctions what are they? 1. Site of product release. 2.Number of cells
site of production release includes? exocrine and endocrine
“internally secretion” - release their product to the extra cellular space - ductless glands - produce hormones that enter the blood or lymphatic fluid - very diverse group endocrine
the product being released the process of releasing the product secretion
“external secretion” - send their product to an epithelial surface inside or outside the body - secrete products onto body surfaces or in body cavities (have ducts) exocrine
(number of cells) scattered in epithelial sheets unicellular (characteristics of glandular cells)
produce mucin that dissolves in water to make mucus goblet cells
form by invagination or evagination of an epithelial sheet and most have ducts 2 parts to a multicellular gland: duct & secretory unit mulitcellular (characteristics of glandular cells)
two types of ducts simple and compound
single unbranched duct single glands
branched duct compound glands
3 types of secretory units tubular, acinal&alveolar, &tubuloaveolar
secretory units form tubes tubular
secretory units form small flask-like sacs acinal& alveolar
contains both types of secretory units tubuloalveolar
secrete their products by exocytosis Examples: pancreas, sweat glands (most), salivary glands merocrine gland
accumulate their products then rupture releasing the products and dead cell fragments Example: sebaceous glands holocrine gland
accumulate their products just under the cell membrane then pinch off that portion of the cell releasing the secretory granules and small amounts of cytoplasm Ex: mammary glands apocrine gland
most abundant and widely distributed tissue connective tissue
4 main classes: connective tissue proper, cartilage, bone and blood connective tissue characteristics
major functions: binding and support, protection, insulation, transportation of substances connective tissue
avascular to richly vascularized connective tissue
Created by: a.quimbaya1