Glands can be classified based on several histological criteria:
- Shape of Secretory Units: Tubular, acinar (spherical), or tubuloacinar (combination of tubular and acinar). - Duct Arrangement: Simple (unbranched ducts) or compound (branched ducts). - Nature of Secretion: Serous (watery and protein-rich), mucous (viscous and carbohydrate-rich), or mixed (both serous and mucous).
