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A Few Additional Slides to Help Your Study for BIOL 232 Lecture Exam #1 Please note that there are notes associated with these slides. They are embedded within the PowerPoint file. If you do not know how to access them, look below this slide to the large grey line and move your cursor over this line until you can click on it and move the line upwards. This will reveal the notes for each slide. Figure 4.5 Types of multicellular exocrine glands. Tubular secretory structure Simple duct structure Compound duct structure (duct does not branch) (duct branches) Simple tubular Simple branched tubular Example Example Compound tubular Intestinal glands Stomach (gastric) glands Duodenal glands of small intestine Example Alveolar secretory structure Simple alveolar Simple branched alveolar Compound alveolar Example Example Example No important example in humans Sebaceous (oil) glands Mammary glands Surface epithelium Copyright © 2010 Pearson Education, Inc. Duct Secretory epithelium Compound tubuloalveolar Example Salivary glands Figure 4.6 Chief modes of secretion in human exocrine glands. Secretory cell fragments Secretory vesicles (a) Merocrine glands secrete their products by exocytosis. Copyright © 2010 Pearson Education, Inc. (b) In holocrine glands, the entire secretory cell ruptures, releasing secretions and dead cell fragments.