Epithelial Tissue Flashcards
what is epithelial tissue?
tissue that covers surfaces, glands, tubes
characteristics of epithelial tissue…
closely packed in sheets, single or multiple layers, apical surface/basal membrane, avascular, has a nerve supply, high cell division
cells that are flat and allow for rapid passage of substances (ex. cheek cells) are…
squamous epithelium
cells that are square and responsible for secretion and absorption are…
cuboidal epithelium
cells that are taller, offer more protection, secretion and absorption, and may have vili or cilia on the surface are…
columnar epithelium
cells that change shape (can go from cuboidal to flat) due to stretching (ex. in bladder) are…
transitional epithelium
a single layer of cells that carry out diffusion, osmosis, filtration, secretion and absorption are…
simple epithelium
where are simple squamous cells found?
the lining of the heart, the alveoli, and blood vessels
where are simple columnar cells found?
ovaries, secretory glands, thyroid
definition of ciliated
moves mucus and particles
cells in 2 or more layers that protect underlying tissue/skin from heat (ex. peeling off blisters) is…
stratified epithelium
where is CILIATED simple columnar epithelium found?
the trachea/upper respiratory tract (moves mucus up tract)
specialized epithelium that secretes substances are…
glandular epithelium
endocrine glands are responsible for…
secreting hormones into interstitial fluid (ex. pituitary, adrenal, thyroid glands)
exocrine glands are responsible for…
secreting substances into ducts (ex. secretes mucus, perspiration, milk, saliva, digestive enzymes)
