Types of Epithelial Tissue

Nervous Tissue

found in brain and spinal cord and branching nerves

neurons

(nerve cells) make up nervous tissue

dendrites

branching fibers connecting to axons

axons

allows nerve impulses to jump to the next neuron

muscular tissue

long and fibrous, made for contractions

cardiac mt

found in the heart
one nucleus
striated
involuntary contraction
branching

intercalated disc

connects cardiac mt cells

skeletal mt

striated
multinucleated
voluntary contraction
partial repairs

smooth mt

slender and tapered
not striated
found in hollow organs and tracts
can divide/regenerate after injury

myofibrils

tiny fibers that make up skeletal and cardiac mt

Epithelial tissue

consists of sheets of cells that form glands and lines all body surfaces, cavities, and ducts

basement membrane

tin sheet of protein fibers acting as a platform for the cells.

simple squamous

one layer, allows substances to diffuse across them easily, can absorb and secrete

cuboidal tissue

found in glands, ducts, and tubes, allow limited portection, secretion, and absoprtion,

columnar cells

can be ciliated, protect, secrete, and absorb

cilia

sweep debris along tracts (fallopian tubes and respiratory tracts)

pseudostratified

means that it seems stratified but all cells touch the basement

goblet cells

produce musuc to trap dirt and bacteria to be moved allong by cilia

transitional epithelia

stratified with cells that change shape depending on whether they need to stretch (found in urinary tract and vagina)

glands

produce secretions, made of mostly cuboidal cells

exocrine glands

release secretions on teh surface

endocrine glands

release secretions/hormones into the blood stream

CT

connects organs, tissues, cartilage, and bones
supports, binds, and separates tissues and organs

ground substance

colorless material, gel-like, surrounds cells and fibers of CT and provides structural support (aka a matrix)
facilitates diffusion of o2, electrolytes, nutrients ebtween cells and blood vessels

adipose tissue

contains adipocytes (fat cells), CT becomes adipose when it is overrun by fat cells
found under the skin, around organs

areolar tissue

contains diverse cell and tissue types

found beneath skin, cushioning and protecting organsf

fibroblasts

create fibers

macrophased

WBC that eat pathogens that enter tissue

lymphocytes

helps w immune response

mast cells

help with allergic responses and stimulate bodily reaction during injury or infection

collagen fibers

thick and strong

elastic fibers

wavy and stretchy

reticular fibers

provide support, narrow and branching

Cartilage

made up on chondrocytes

Lacunae

little grooves that house chondrocytes

Hyaline cartilage

closely packed collagen, caps ends of bones to prevent frictional damage

elastic cartilage

has elastic fibers, found in epiglottis, external flap of ear

fibrocartilage

densw, with many interwoven collagen, resists compression and shock (found in between vertebrae and joints)

Dense regular CT

parallel collage fibers, makes up ligaments and tendoms for strength

Dense irregular CT

interwoven collagen with some elastic, found covering organs, bones, cartilage, and supports epithelial layers of skin

Reticular tissue

supports the liver and lymphatic cells, made up of reticular fibers

Elastic tissue

found in artery walls, some veins, air cells of lungs, and ligaments,

blood

type of fluid ct, made up of RBC, WBC, and platelets

plasma

name of matrix in blood

bone tissue

strong ground substance (calcified), made of osteocytes found in lacunae, situated in circles called osteons, recieve nutrients from capilaries thru canaliculi