lecture 1 Flashcards
tends to line and cover and form glands, cellular and avascular
epithelium
is characterized by its matrix, tends to be supportive, most common cell type- mesenchyme
connective tissue
contracts, causing movement and comes in three types: skeletal, cardiac and smooth, vascular
muscle
generates and conducts electrical impulses and is composed of two cell types: neurons and glial cells
nervous tissue
4 tissue types
epithelium
connective tissue
muscle
nervous tissue
general features of lining epithelia
continusous sheets
servers as barrier
avascular
rests on a basement membrane
most are mitotically active
three types of epithelia
lining
glands
special (endothelium lining of blood vessel)
some functions of epithelial
- mechanical protection
- protection against dehydration
- selective absorption (only want good stuff)
- secretion and lubrication
- digestion
- transport
- excretion
- reproduction
lining/ surface epithelia can be classified
number of cell layers
- simple
- stratified
- pseudostratified
Height and shape
- squamous
- cuboidal
- columnar
- transitional
simple squamous epithelia
- single layer of flattened cells
- function: exchange: sites of fluid, metabolite or gas exchange
- Alveoli of lungs, Bowman’s capsule
what is this and what type of epithelia do you see
bowman’s capsule
simple squamous epithelium
bulging nucleus, thin cell, little cytoplasm
simple cuboidal epithelium
collecting ducts of nephrons and some glands
lining, secretion and absorption
what kind of epithelium?
simple cubodial epithelium
thyroid gland
Simple columnar epithelium
taller then wide, oval nucleus
- small intestine, gallbladder and some glands
- lining, secretory (mucus in the cervix), absorptive (let some things in and keep other things out)
what kind of epithelium do you see?
simple columnar epithelium
gallbladder
pseudostratified columnar epithelium
nucleus looks layered all squished together
- trachea, epididymis fallopian tubes
- lining, secretory, absorptive and movement
what kind of epithelium
pseudostratified columnar epithelium
trachea