RT Book, Section A1 Mescher, Anthony L. SR Print(0) ID 1160663410 T1 Endocrine Glands T2 Junqueira’s Basic Histology: Text and Atlas, 15e YR 2018 FD 2018 PB McGraw-Hill Education PP New York, NY SN 9781260026177 LK accessmedicine.mhmedical.com/content.aspx?aid=1160663410 RD 2024/04/19 AB Secretory cells of endocrine glands release their products, signaling molecules called hormones, into the neighboring vascularized compartment for uptake by capillaries and distribution throughout the body. There is no secretory duct as in exocrine glands. Endocrine cells are typically epithelial, at least in origin, and aggregated as cords or clusters. Besides the specialized endocrine glands discussed in this chapter, many other organs specialized for other functions, such as the heart, thymus, gut, kidneys, testis, and ovaries, contain various endocrine cells (Figure 20–1).