Epithelial Tissue Types Flashcards
Endothelium tissue:
Simple squamous epithelial tissue IN blood vessels
Mesothelium:
Simple squamous epithelial tissue in areas forming serous membranes
SIMPLE EPITHELIUM:
ONE LAYER OF CELLS. FOUND WHERE FILTRATION AND ABSORPTION IS IMPORTANT, SUCH AS THE LINING OF INTESTINES AND BLOOD VESSELS.
STRATIFIED EPITHELIUM:
MULTIPLE LAYERS OF CELLS. FOUND IN SKIN AND ESOPHAGUS.
EPITHELIUM TISSUES PURPOSE ARE:
TO PROVIDE PROTECTION
How do epithelial tissues get substances?
Diffusion, osmosis, or filtration
Squamous cell:
squashed/almost flat looking cells
Cuboidal cell:
cell that is as tall as it is wide – like a cube
Columnar cell:
Cell that is taller than it is wide
_____ tissue allows fast movement of molecules across the membrane.
Simple squamous epithelium
Simple cuboidal epithelium are really good in _____ and _____. They _____ different molecules or _____ them.
Ducts; glands. Secrete; absorb.
Simple cuboidal epithelium can be found:
Kidney tubules, thyroid gland follicles, surface of ovary; secretory regions and ducts of most glands
Simple squamous epithelium can be found:
alveoli, mesothelium, and endothelium
NONCILIATED SIMPLE COLUMNAR EPITHELIUM:
APICAL (TOP LAYER) REGIONS OF CELL MAY HAVE MICROVILLI; MAY HAVE GOBLET CELLS (CELLS THAT SECRETE MUCIN);
What is the function of nonciliated simple columnar epithelium? Where can it be found?
ABSORPTION AND SECRETION; SECRETION OF MUCIN; FOUND IN INNER LINING OF MOST DIGESTIVE TRACT
CILIATED SIMPLE COLUMNAR EPITHELIUM:
LAYER OF CILIATED CELLS; MAY CONTAIN GOBLET CELLS
Function of ciliated simple columnar epithelium? Where can it be found?
SECRETION OF MUCIN AND MOVEMENT OF MUCUS ALONG APICAL SURFACE OF EPITHELIUM BY CILIA; OOCYTE MOVEMENT THRU UTERINE TUBE; FOUND IN UTERINE TUBES AND LARGE BRONCHIOLES
CILIATED PSEUDOSTRATIFIED COLUMNAR EPITHELIUM:
LAYER OF CELLS WITH VARYING HEIGHTS THAT ARE ALL CONNECTED TO BASEMENT MEMBRANE, BUT NOT ALL CELLS REACH APICAL SURFACE; HAS GOBLET CELLS AND CILIA
What is the function of pseudostratified columnar epithelium? Where can it be found?
PROTECTION; SECRETION OF MUCIN AND MOVEMENT OF MUCUS ALONG APICAL SURFACE OF EPITHELIUM BY CILIA; FOUND IN LINING OF THE LARGER AIRWAYS (INCLUDING NASAL CAVITY), PART OF PHARYNX, LARYNX, AND TRACHEA AND BRONCHI
NONCILIATED PSEUDOSTRATIFIED COLUMNAR EPITHELIUM:
SAME AS CILIATED PSEUDOSTRATIFIED COLUMNAR EPITHELIUM BUT W/O GOBLET CELLS OR CILIA
What is the function of nonciliated pseudostratified columnar epithelium? Where is it found?
PROTECTION; FOUND IN LINING OF MALE URETHRA AND EPIDIDYMIS
KERATINIZED STRATIFIED SQUAMOUS EPITHELIUM:
APICAL CELLS ARE SQUAMOUS; APICAL CELLS ARE DEAD AND FILLED WITH KERATIN. function: PROTECT UNDERLYING TISSUE FROM ABRASION. found: IN EPIDERMIS OF SKIN
NONKERATINIZED STRATIFIED SQUAMOUS EPITHELIUM:
APICAL CELLS ARE SQUAMOUS; CELLS LACK KERATIN; APICAL CELLS ARE ALIVE AND MOIST. function: PROTECT UNDERLYING TISSUE. found: IN LINING OF ORAL CAVITY, VAGINA, AND ANUS
STRATIFIED CUBOIDAL EPITHELIUM:
APICAL CELLS ARE ABOUT AS TALL AS THEY ARE WIDE. function: PROTECTION AND SECRETION. found: IN DUCTS OF MOST EXOCRINE GLANDS AND OVARIAN FOLLICLES
STRATIFIED COLUMNAR EPITHELIUM:
APICAL CELLS ARE TALLER THAN THEY ARE WIDE. function: PROTECTION AND SECRETION. found: IN LARGE DUCTS OF SALIVARY GLANDS, MALE URETHRA, AND CONJUCTIVA COVERING THE EYE
TRANSITIONAL EPITHELIUM:
APPEARANCE VARIES DEPENDING ON WHEHTER RELAXED OR DISTENDED. RELAXED – HAS CUBOIDAL/POLYHEDRAL CELLS AND APICAL CELLS ARE LARGE AND ROUND. DISTENDED – HAS FLATTENED APICAL CELLS; SOME ARE BINUCLEATED. function: ACCOMMODATES URINE VOLUME CHANGES. found: IN URINARY BLADDER, URETERS, AND URETHRA
Pseudostratified ciliated columnar epithelium is found lining:
parts of the respiratory system
