Exocrine glands of the skin. A) Mucous glands are prominent in the integument and secreted mucus through an excretory duct composed of cuboidal epithelium. The mucous cell have a highly vacuolated cytoplasm and a round nucleus. B) The protein secreting glands of the skin (also called granular cells) secrete their proteinaceous products through an excretory duct composed of cuboidal epithelium. Unlike the mucous gland cells, these granular cells constitute a syncytium (fusion of several cells). Image from AF Wiechmann and CR Wirsig (2003) "Color Atlas of Xenopus laevis Histology", (page 87, Chapter 9, Integument: Figure 6). Copyright 2003. Kluwer Academic Publishers. Reproduced with kind permission from Springer Science & Business Media B.V.
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