Epithelial Tissues

Front 1

EPITHELIAL

Back 1

-lack blood vessels (avascular)
-heals rapidly, reproduces quickly
-tightly packed, good barrier
-excretion, absorption, secretion, sensory reception

Front 2

Simple Squamous

Back 2

Simple = one-layer
-Squamous = broad, flat
-substances pass easily
-diffusion and filtration take place in air sacs of lungs
-lines filtration membrane
-forms capillaries
-covers the membranes that line body cavities
- thin, easily damaged

Front 3

Simple Cubodial

Back 3

-cube-shaped cells
-centrally located spherical nuclues
- covers ovaries
-lines kidney tubules. help with secretion and absorption
-lines ducts of glands - secrete grandular products

Front 4

Simple Columnar

Back 4

elongated, composed of a single layer
-linings of the uterus and various organs of the digestive tract, stomach and intestines
-thick, provides protection for underlying tissues
-secretes digesstive fluid and absorbs nutrient molecules from digestion
- absorption
-cyndrical processes called microvilli which increase the surface area of the cell membrane
- have goblet cells that secrete mucus

Front 5

Pseudostratified Columnar

Back 5

Pseudo = false
stratified = layered
-tissue looks layered due to nuclei located at 2 or more levels
-posses cilia
-goblet cells secrete mucus that is passed along by cilia
-lines passages of trachea
- respiratory sys - mucus traps dust and the cilia move the particles
-reproductive sys - cilia moves the sex cells

Front 6

Stratified Squamous

Back 6

many layers of cells, thick
- forms outer layers of skin called epidermis
-as skin ages, accumulates a protein callled keratin, hardens the skin cells to produce a proetective meterial that prevents microorganisms from escaping and water from entering.
- closer the connective tissue = closer the nutrients

Front 7

Transitional Epithelial

Back 7

- large and round
-move, distend
- repsonds to tension
- found in lining of urinary bladder and passageways of urinary system
-forms expandable lining
-forms barrier to prevent the contents from diffusing out

Front 8

Glandular Epithelial

Back 8

-composed of cells that secrete and make substances
-occur in simple cubodial and simple columnar
- one more of the cells make a gland

Front 9

Glandular Epithelial - Exocrine glands

Back 9

- glands that secrete their product onto internal or external surfaces are called exocrine

Front 10

Glandular Epithelial - Endocrine glands

Back 10

glands that secrete into tissue flood or blood stream are called endocrine glands

Front 11

Exocrine glands - Merocrine

Back 11

secrete by exocytosis
-pancreas, sweat, salvary glands

Front 12

Exocrine glands - Apocrine

Back 12

-pinched off in secretion
-accumulate products until rupture
-mammary glands

Front 13

Exocrine glands - Holocrine

Back 13

cells ladden with secretory product
-accumulate products
- release secretory glanules
-sebeceous glands

Front 14

-lack

Back 14

blood