Tissues

Front 1

Back 1

simple squamous epithelium

simple layer of flattened cells, disk-shaped central nuclei

allows passage of materials by diffusion in sites where protection isn't important. Secretes lubricating substances

lining of heart, air sacs of lungs, blood vessels

Front 2

Back 2

simple cuboidal epithelium

single layer of cube-like cells, large spherical central nuclei

secretion and absorption

ducts and secretory portion of small glands, kidney tubules

Front 3

Back 3

simple columnar epithelium

single layer of tall cells with round to oval nuclei

absorption, secretion of mucus/enzymes, ciliated and nonciliated

nonciliated lines digestive tract, ciliated line uterus

Front 4

Back 4

psudostratified columnar epithelium

single layer of cells with differing heights, nuclei at different heights

secretion of mucus, ciliated and nonciliated

celiated lines trachea, nonciliated lines ducts of large glands

Front 5

Back 5

stratified squamous epithelium

thick membrane composed of several cells layers

protects underlying tissues in areas subjected to abrasion, keratinized and nonkeratinized

nonkeratinized lines esophagus, keratinized forms epidermis

Front 6

Back 6

stratified cuboidal epithelium

two layers of cuboidal cells

protection

lines largest sweat gland ducts

Front 7

Back 7

stratified columnar epithelium

several layers, basal cells are cuboidal and superficial cells are columnar

protection, secretion

rare in body, male urethra

Front 8

Back 8

transitional epithelium

resembles stratified squamous and stratified cuboidal, basal cells cuboidal/columnar, surface cells are squamouslike

stretches readily

line urinary bladder, urethra

Front 9

Back 9

areolar loose connective

gel-like matrix with cells (fibroblasts, macrophages, mast cells)

wraps and cushions organs

forms lamina propia under the epidermis, wraps capillaries and organs

Front 10

Back 10

adipose loose connective

closely packed adipocytes, have nuclei pushed to side

provides reserve fuel, insulates

in breasts

Front 11

Back 11

reticular loose connective

network of reticular fibers in ground substance

fibers form soft internal skeleton (stroma) that supports other cell types

lymph nodes, bone marrow

Front 12

Back 12

dense regular

parallel collagen fibers

attaches muscles to bones, withstands tensile stress in one direction

tendons, ligaments

Front 13

Back 13

elastic dense

high proportion of elastic fibers

allow recoil of tissue after stretching

walls of large arteries, aorta of heart

Front 14

Back 14

dense irregular

irregularly arranged collagen and elastic fibers

withstands tension in many directions

fibrous joint capsule

Front 15

Back 15

hyaline cartilage

matrix, chondrocytes in lacunae

supports, reinforces, cushions

ends of long bones, ribs, nose

Front 16

Back 16

elastic cartilage

more elastic fibers than hyaline

maintains shape while being flexible

ear

Front 17

Back 17

fibrocartilage

less firm than hyaline, thick collagen fibers

tensile strength, absorbes compressive shock

intervertebral disks

Front 18

Back 18

osseous tissue

hard calcified matrix, collagen fibers, osteocytes

bones

Front 19

Back 19

blood

red and white blood cells in plasma

Front 20

Back 20

nervous tissue

branching neurons

transmit electrical signals from sensory receptors

brain, spinal cord, nerves

Front 21

Back 21

skeletal muscle

long, cylindrical cells, striations, parallel

voluntary movement

skeletal muscles attached to bones

Front 22

Back 22

cardiac muscle

branching, striated

involuntary control

walls of heart

Front 23

Back 23

smooth muscle

no striations, sheets of closely placed cells

propels substances along passageways, involuntary control

walls of hollow organs