bio 137 Lab, epithelium, tissues

simple squamous epithelium

single flattened layer of cells

alveoli for gas exchange

diffusion

simple cuboidal epithelium

single layer of cells with circular nucleus

kidneys for section

simple columnar epithelium

single layer of tall cells

nucleus line up

digestion for absorption

pseudostratified columnar epithelium

looks stratified but isn’t

nucleus don’t line up

Trachea

have cillia for mucus movement

stratified squamous epithelium

multiple layers of flattened cells towards surface

epidermis

resist friction

urothelium or transitional epithelium

cell shape doesn’t change

expansion in bladder

skeletal muscle tissue

heavily striated

voluntary

multiple nuclei

cardiac muscle tissue

little striations

involuntary

intercalated discs (gap junctions for heart cells to communicate)

smooth muscle tissue

no striations

involuntary

one nucleus

digestive-peristalsis

nervous tissue

dendrites-incomming information

neurosema-control center

axon-outgoing information

dense regular connective tissue

closely packed and wavy

tendons and ligaments

strong in one line of stress

dense irregular connective tissue

random pattern

dermis (middle layer of skin)

strong in multiple lines of stress

hyaline cartilage

google eyes, clear matrix

joins

reduces friction

fibrocartilage

fibers in matrix and between cells

intervertebral discs

shock absorption

elastic cartilage

net like pattern

rule of ease-external ear and epiglottis

flexible

compact bone

concentric circles

osteon- functional unit of impact bone