Histology epithelial

what is histology

study of tissues

what is a tissue

A group of cells that act together to perform a specific function.

what does epithelial tissue do

covers and lines structures

what are the characteristics of epithelial tissues (8)

polarity, attachment, cellularity, avascularity, regenerative ability, good nerve supply, arranged in sheets, medical importance

what is avascularity

lacking blood vessels

what is cellularity

cells bound by gap junctions, not lots of fluid between

what are four functions of epithelial tissue

protection, permeability, sensation, secretion

shape type of epithelial tissue (3)

cuboidal, squamous, columnar

layers of epithelial tissue (4)

simple, stratified, pseudostratified and transitional

what are the 3 shape types are simple layered

simple columnar, squamous and cuboidal

description and function of simple columnar

single layer that secretes mucus

protects, secretes and absorbs

where is simple columnar located

lines digestive tract, gall bladder

what is the description of simple squamous

single layer of flat irregularly shaped cells

what is the function of simple squamous

diffusion, filtration, secretion

where is simple squamous located

air sacs in the lungs and heart

what is the description of simple cuboidal

single layer of cube shape cells

what is the function of simple cuboidal

secretion and absorption

where is simple cuboidal located at

kidney tubules, ovary surface

what 2 shape types do stratified epithelial tissues have

stratified cuboidal, squamous

what is the description of stratified squamous

several stack layers of flat cells

what is the function of stratified squamous

protection from abrasion

what is an example/location of stratified squamous

skin surface, lining of mouth, rectum, anus ect

what is the description of stratified cuboidal

multiple layers of cubed cells

what is the function of stratified cuboidal

protection, secretion, absorption

where can stratified cuboidal tissues be located

lining of sweat gland duct

what is the description of pseudostratified columnar

- attached to basement membrane, nuclei of different cells and different levels, goblet cells

what is the function of pseudostratified columnar

secretion and movement of mucus

where could pseudostratified columnar be located

lines upper respiratory tract and male reproductive ducts

what is transitional epithelium

changes shape and permit distension

what is an example of transitional epithelium

urinary bladder