A Scanning and Transmission Electron Microscope Study of the Association Between Calcoblasts and Growing Microspines in Regenerating Spines of Strongylocentrotus Purpuratus |
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Page 53
... organelles : mitochondria , numerous short profiles of smooth and rough ER , proportionately more light and dark ... organelle filled swellings characteristic of calcoblasts . The most common variation of phagocyte appeared to be an ...
... organelles : mitochondria , numerous short profiles of smooth and rough ER , proportionately more light and dark ... organelle filled swellings characteristic of calcoblasts . The most common variation of phagocyte appeared to be an ...
Page 56
... organelles and ultrastructural components within the sheaths varied from similar to the density in the calcoblastic reticula ( Fig . 13 , 18 ) to sparse ( Fig . 22 ) . Occasionally small buds were found on the stereomal side of the ...
... organelles and ultrastructural components within the sheaths varied from similar to the density in the calcoblastic reticula ( Fig . 13 , 18 ) to sparse ( Fig . 22 ) . Occasionally small buds were found on the stereomal side of the ...
Page 70
... organelles even at the regenerating tip . X20,000 . Scale bar = Scale bar = 1 micrometer Figure 23. Enlargement of Figure 5. Circular bodies line both sides of the microspine ( S ) up to the basal lamina ( arrows ) . Larger circular ...
... organelles even at the regenerating tip . X20,000 . Scale bar = Scale bar = 1 micrometer Figure 23. Enlargement of Figure 5. Circular bodies line both sides of the microspine ( S ) up to the basal lamina ( arrows ) . Larger circular ...
Contents
Fine Structural Cellular and Mineral Changes | 4 |
Sheaths and Reticula Two Patterns | 44 |
A SEM Examination of QuickFrozen | 89 |
Common terms and phrases
20 micrometers Figure 24 hour regenerates 72 hours basal lamina biomineralization occurred calcite calcoblast cap calcoblastic reticula calcoblastic sheath CALIFORNIA/SANTA CRUZ CALIFORNIA/SANTA CRUZ UNIVERSITY Cell types cellular processes extending cellular sheath chemically stabilized/critical point circular bodies cross buttressing cross sections CRUZ The University crystallites cytoplasm distal Draeger echinoid electron microscopy eleocytes epidermal cells Ep extending from calcoblasts extracellular freeze drying freezing frozen/freeze dried regenerates granulocytes Heatfield and Travis hollow arrow Library The University Markel and Roser mature spines microspine tips microspines microvilli millimeters mineral surface mitochondria nucleus old spine regenerate phagocytes regenerates Fig regenerating spine tips reticulum of cellular samples SANTA CRUZ SANTA CRUZ UNIVERSITY Scale bar sea urchin sea urchin Strongylocentrotus sections through cellular serial sections Shimizu and Yamada skeletogenesis solid arrows stabilized/critical point dried stereom stroma Strongylocentrotus purpuratus syncytial tertiary spines University Library UNIVERSITY UNIVERSITY OF CALIFORNIA UNIVERSITY OF CALIFORNIA/SANTA urchin Strongylocentrotus purpuratus vacuolecytes vacuoles week old regenerates