Tissues (Histology) - WK3 L3 Flashcards
WHAT ARE THE FOUR PRIMARY TISSUE TYPES?
EPITHELIAL - CONNECTIVE - NERVOUS - MUSCULAR
WHAT ARE EPITHELIAL CELLS COMPOSED OF?
CLOSELY SPACED LAYERS OF CELLS
ARE EPITHELIAL CELLS AVASCULAR?
YES
WHAT IS AVASCULAR?
NO ROOM BETWEEN CEELS FOR BLOOD VESSELS
WHERE ARE EPITHELIAL CELLS LOCATED?
UPPER SURFACE USUALLY EXPOSED TO ENVIRONMENT OR IN INTERNAL BODY SPACE
WHAT ARE THE 5 FUNCTIONS OF EPITHELIAL CELLS?
PROTECTION- SECRETION - ABSORBTION - FILTRATION - SENSATION
WHAT ARE EXAMPLES OF PROTECTION OF EPITHELIAL CELLS?
THE OUTER LAYER OF SKIN PROTECTING THE UNDERLYING STRUCTURES FROM ABRASIONS
WHAT ARE EXAMPLES OF SECRETION OF EPITHELIAL CELLS?
MUCUOUS GLANDS, SWEAT GLANDS, ENZYME SECRETING GLANDS OF PANCREAS COMPOSED OF EPITHELIAL CELLS
WHAT ARE EXAMPLES OF ABSORPTION OF EPITHELIAL CELLS?
ABSORBTION OF NUTRIENTS AND VITAMINS THROUGH SKIN
WHAT ARE EXAMPLES OF FILTRATION OF EPITHELIAL CELLS?
KIDNEY EPITHELIAL CELLS IN GLOMERULI FILTER WASTE FROM BLOOD CAPILLARIES
WHAT ARE EXAMPLES OF SENSATION OF EPITHELIAL CELLS?
EPITHELIAL STRUCTURES WITH SENSORY NERVE ENDINGS LIKE IN SKIN, NOSE, EARS, EYES
WHAT ARE THE 3 MAIN LAYERS OF EPITHELIAL CELLS?
SIMPLE - STRATIFIED - PSEUDOSTRATIFIED
WHAT ARE THE SIMPLE LAYERS OF EPITHELIAL CELLS?
SINGLE LAYERED - SQUAMOUS - CUBOIDAL - COLUMNAR
WHAT ARE EXAMPLES OF SIMPLE LAYERS OF EPITHELIAL CELLS?
SIMPLE SQUAMOUS - INSIDE ALVEOLI IN LUNGS
SIMPLE CUBOIDAL - KIDNEYS, LIVER
SIMPLE COLUMNAR - STOMACH, INTESTINES
WHAT ARE THE STRATIFIED LAYERS OF EPITHELIAL CELLS?
MULTIPLE LAYERS - KERATINOUS SQUAMOUS - NON KERATINOUS SQUAMOUS - CUBOIDAL - TRANSITIONAL
WHAT ARE EXAMPLES OF STRATIFIED LAYERS OF EPITHELIAL CELLS?
KERATINOUS SQUAMOUS - SKIN
NON KERATINOUS SQUAMOUS - MOUTH, ESOPHAGUS, ANUS, VAGINA
CUBOIDAL - KIDNEYS, OVARIES, TESTICLES
TRANSITIONAL - URINARY BLADDER
WHAT ARE THE PSEUDOSTRATIFIED LAYERS OF EPITHELIAL CELLS?
SINGULAR LAYERS OF IRREGULARLY SHAPED COLUMNAR CELLS