Glandular cells

Glandular cells are specialized epithelial cells that constitute the secretory units of exocrine and endocrine glands. They synthesize and release specific products. Exocrine glandular cells (e.g., in salivary, sweat glands) secrete via ducts. Endocrine glandular cells (e.g., in thyroid, pituitary) secrete hormones directly into the bloodstream. Their morphology is adapted for secretion, with abundant rough ER and secretory granules.