Set up mitotic spindle 9 groups of 3 microtubules

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Unformatted text preview: triplets arranged as a cylindrical structure. Centrioles always organize themselves as pairs (called centrosomes). set up mitotic spindle, 9 groups of 3 microtubules, form short cylinder Fig. 2-24 2-4 3 non-membranous, non-organelle inclusions (mainly involved in storage) are also present in cells: • lipid droplets (a), usually unstained vacuoles, empty due to lipid removal in paraffin processing, or uniformly stained for TEM, as seen here • glycogen granules (b), best seen as pink granules after periodic acid-Schiff (PAS) staining or electron-dense dots, as seen here • melanin deposits (c), containing a brown pigment, one of the only naturally colored cellular materials, seen here by light microscopy Fig. 2-28...
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