Poistokanavat
Poistokanavat, known in English as excretory ducts, are channels that carry secretions produced by glands or secretory cells to a destination such as a body surface or a lumen. They are essential components of the exocrine system, enabling the controlled discharge of substances including enzymes, mucus, sweat, bile, and tears. Ducts vary from simple single passages to complex, branched networks that connect with multiple secretory units.
Anatomy and histology: Ducts can be simple or compound. The lining epithelium changes along the duct, ranging
Examples: In the skin, eccrine and apocrine sweat glands drain through ducts to the skin surface. The
Clinical relevance: Obstruction, inflammation, or injury of a duct can impair gland function and cause swelling