Epithelium and Glands Flashcards
Epithelium tissues line the coelomic or serous cavities where epithelial is known as?
mesothelium; the plueral (lungs), pericardial (heart), peritoneal (abdominal)
Epithelium lines the cardiovascular channels, where epithelium is known as?
endothelium
What are basal lamina made up of?
Type IV collagen, the glycoprotein laminin and entactin and heparin sulfate.
Epithelial tissue contain no blood vessels so it is known as?
Avascular; with nourishment occurring via diffusion (rate limiting) from vasculature in the underlying connective tissue
Presence of keratin filaments provides strength to individual cells and via ___ makes epithelium behave like a ?
desmosomes; a continous membrane or sheet
Where would you find simple squamous epithelium?
Endothelium, mesothelium, panetal layer of Bowman’s capsule, thin segment of loop of Henle, rete testis, pulmonary alveoli.
Where would you find simple cuboidal epithelium cells?
Thyroid, choroid plexus, ducts of many glands, inner surface of the capsule of the lens, covering surface of ovary
Where would you find simple columnar epithelium cells?
surface of the stomach Small and large intestine Gallbladder, excretory ducts of glands Uterus, oviducts Small bronchi of lungs some paranasal sinuses
Where would you find pseudostratified columnar cells?
Large excretory ducts of glands, portions of male urethra
Epididymis
Trachea, bronchi
Eustachian tube
Where would you find stratified squamous epithelial cells?
Buccal surface, esophagus, epigiottis, conjunctiva, cornea, vagina, Epidermis of skin, Gingiva, hard palate
portions of tympanic cavity
Where would you find stratified cuboidal and stratified columnar?
Ducts of sweat glands
Cavernous urethra, fornix of conjunctiva, large excretory ducts of glands
Where would you find transitional, germinal epithelium cells?
Urinary system: renal calyces to urethra
What is glandular epithelia?
This type of epithelium is comprised of groups of cells whose specialized function is secretion. The secretory cells of the gland are referred to as the PARENCHYMA. The connective tissue within the gland, which supports the secretory cells, is called the STROMA.
What is the main difference between exocrine and endocrine glands?
Exocrine glands has a duct portion and it secretes onto the surface or into the cavity of a hollow organ; endocrine duct disappears, it does not secrete onto the surface it secretes to blood vessels
Submandibular salivary gland is what kind of gland?
Compound tubuloacinar gland
