Type of secretion of exocrine glands
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<span class="int-own-work" lang="en">Own work</span> based on <a rel="nofollow" class="external text" href="http://www.lab.anhb.uwa.edu.au/mb140/CorePages/Epithelia/Epithel.htm#Secretory">School of Anatomy and Human Biology - The University of Western Australia, Blue Histology - Epithelia and Glands</a>