MICROANATOMY

Detailed explanation-1: -Two principal types of glands exist: exocrine and endocrine. The key difference between the two types is that, whereas exocrine glands secrete substances into a ductal system to an epithelial surface, endocrine glands secrete products directly into the bloodstream [1].

Detailed explanation-2: -Unicellular Exocrine Glands The goblet cell, located in the epithelial lining of the small and large intestines and of the conducting portion of the respiratory tract, is the principal example of a unicellular exocrine gland (Fig. 5.9). The narrow base of the goblet cell, known as the stem, contacts the basal lamina.