Glandular epithelium Prof Dr Anna L Kiss Department

Glandular epithelium Prof. Dr. Anna L. Kiss Department of Anatomy, Histology and Embryology Semmelweis University 2020

Glandular tissue - Specialized cells: secretion Endokrin- or exocrin glands

Exocrine glands Unicellular glands: • Endoepithelial: goblet cells • exoepithelial

Unicellular endoepithelial gland: goblet cell Secretory granules Golgi RER mucus secreting cells: mucus: protein+carbohydrate

WGA Lectin immunohistochemistry

Exocrine glands simple compound tubular alveolar Tubulo-alveolar

Exocrine glands -Secretory pathways: - merocrine: continuous exocytosis (most of the glands) - apocrine: modified sweat gland, mammary gland - holocrine: (the whole cell becomes secretum) sebaceous gland

Merocrine secretion

Apocrine secretion

Holocrine secretion

Secretory pathways

Exocrine glands chemical composition of the secretum: a. ) serouos: protein well developed r. ER strong basophyl staining, narrow lumen

Exocrine glands b. ) mucus glands: carbohydrate well developed Golgi apparate, wide lumen

Exocrine glands c. ) mixed Gianuzzi demilune

Gianuzzi demilune? ?

Salivary glands: duct system interlobular duct system intralobular duct system

Salivary glands: duct system striated duct: active transport: many mitochondria

Intralobular: intercalated+striated ducts

Myoepithelial cells

Felhasznált irodalom Röhlich Pál: Szövettan. Budapest, 1999 A szövettani képek a Humánmorfológiai és Fejlődésbiológiai Intézet gyűjteményéből származnak. Carola R, Harley JP, Noback CR: Human Anatomy & Physiology, Mc. Graw-Hill Inc. , USA, 1990 Wikipedia