Tissues and Histology

epithelia

closely aligned cells that form sheets on top of extracellular matrix

simple

single layer; form liners and allow exchanges of substances

stratified

more than a single layer; found where protection is needed

glandular epithelia

found in glands that secrete materials

exocrine glands

secrete products onto epithelial surface, usually through a duct or tube

endocrine glands

secrete hormones directly into blood

mucus membrane

on surfaces open to the outside of the body; secrete mucus

serous membrane

line body cavities and secrete serous fluid

loose connective tissue

binds skin to underlying muscle and protects internal organs from injury

adipose tissue

large cells that contain droplets of oil; found around kidneys, heart, under skin, around joints, in breasts

dense regular connective tissue

lots of collagen fibers that resists stretching; in tendons and ligaments

tendons

connects muscle — bone

ligaments

connects bone — bone

elastic connective tissue

lots of elastic fibers; protein fibers that stretch and rebound to their resting length

cartilage

type of connective tissue that is solid but pliable and resists compression; repairs slowly because of lack of blood

hyaline, elastic, and fibrocartilage

types of cartilage

bone

special cells maintain size and shape; spongy and compact

muscle tissue

only tissue in body with cells that contract in response to stimuli

skeletal

makes bones move; striated

cardiac

only found in heart; striated

smooth

walls of tubes in the body; not striated

nervous tissue

made up of neurons