epithelial + connective tissues

organ

collection of tissues working together to perform a function

cell

structural/functional basic unit of all living organisms

tissue

A group of cells working together to perform a particular function. connective, epithelial, muscle, nervous.

Function

connective: link body parts together.

epithelial: barrier between outside, controls what goes in

muscle: fibers flex to allow movement

nervous: send and relay signals

Subtypes

connective = loose, dense, fluid, supporting

epithelial = squamous, columnar, ciliated columnar, cubodial, glandular, transitional, pseudo stratified, stratified, simple

muscle = smooth, striated, cardiac

nervous = motor, sensory, inter

Connective tissue subtypes

dense = contains collagen, forms tendons and ligaments, connects muscle to bone - bone to bone

loose = holds organs in place, attaches epi tissue to other tissues, mesh of fibres, fibres can be elastic, collagenous or reticular.

specialised = support organism structure, has bone and cartilage

fluid = includes blood and nymph, tissues are liquid, connect whole body, pumped by heart.

Epithelial tissue subtypes

simple

squamous = allow material to pass thru by diffusion + filtration, secretes lube

cubodial epithelium = secretes + absorbs

columnar epithelium (tall) = absorbs and secretes mucous + enzymes

stratified

squamous epithelium (flattened) = protects against abrasion

cubodial epithelium (symmetrical) = protective tissue

columnar epithelium (tall) = secretes + protects

pseudostratified

columnar epithelium (messy single layer) = secretes mucous, cilitated tissue moves it

transitional

epithelium = allows urinary organs to expand and stretch

glandular cells = secrete proteins into cavity above

ciliated columnar cells = tall epithelial cells w cilia