Watery and hypotonic. Eccrine - low protein, odorless. Apocrine - more protein, smelly.
Watery suspension of protein (some IgA), lipids, carbohydrates, mineral, electrolytes.
Protein secreted by merocrine. Lipids secrete via apocrine.
Mixed Function Gland
2 acini types: Serous and mucous. Mucous on inside with Serous Demilune.
Cap may be result of fixation. Rapid freezing shows Secretory Canaliculi channels allowing mucous and serous products to mix. EX salivary glands.
Conventional fixation artifact of mixed function gland. Outer serous acini covering inner mucous acini
Channels between mucous cells allowing serous secretions to mix into a mucoserous product.
Spindle shaped cells in basement membrane of secretory units. Sit between basal lamina and basal membrane. Actin/Myosin contractile units - squeeze out secretory product. Keratin intermediate filaments. Ectoderm origin.
Myoepithelium location and construction
Basement membrane between basal lamina and basal membrane. Myosin/actin filaments. Attached via hemidesmosomes and desmosomes.
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