Micro - Glands Flashcards
Exocrine glands
retain their connection to the surface of epithelia
Secrete onto a free surface or via a duct
Endocrine glands
lose their connection to the surface
secrete into the surrounding CT
Exocrine glands structure
unicellular, multicellular Simple/compound - duct branches Tubular, acinar/alveolar, tubuloalveolar Method of release - merocrine, apocrine, holocrine Secretory cells - serous, mucous
Endocrine glands structure
have no ducts release hormones into CT unicellular or multicellular Organized as cords of cells or follicles Follicle - single layer of cells surrounding a lumen
Diffuse Neuroendocrine system
Unicellullar endocrine glands
Simple glands
Unbranched ducts
Compound glands
Branched ducts
Merocrine Secretion
only secretory material is released from cell
secretory material is contained within a vacuole in cytoplasm
fuses with PM
Apocrine Secretion
Some other part of cell is lost with the material
Rare
portion of PM can leave
Holocrine secretion
Entire cell is shed and breaks down
Sebaceous gland
Serous cells
round nucleus
Apical end - eosinophilic due to proteins
Basal end - RER dark
secrete fluid rich in glycoproteins and ions
Mucous cells
flatten nucleus - secretory vacuoles flatten them
Secrete glycoproteins - mucinogens –> mucins –> mucus
Very pale cytoplasm
Parotid gland
Pure serous
Brunners gland
Pure mucus
Submandibular gland
Mixed mucoserous
Mostly serous
serous demilunes
