Tissue Engineering And Nanotheranostics

(Steven Felgate) #1
b2815 Tissue Engineering and Nanotheranostics “9.61x6.69”

216 Tissue Engineering and Nanotheranostics


Once a second pair of centrioles is formed, the younger pair will


break away from the original pair and move to the opposite side of the


nucleus — as noted earlier. But during this movement the younger


centriole pair becomes more mature, increasing in size so that by the


time it is on the opposite side of the nucleus it is of equivalent vitality


as the older centriole pair is left behind. Cell separation can then


occur by the opposing centriole pairs, extending their microtubules


about the nucleus and connecting to the kinetochores at the mid­


plane of the nucleus. Once these connections occur the nucleus is


pulled apart with each half taking approximately half of the cytoplasm.


Thus two cells are formed. See Fig. 10.


Fig. 10. Cell duplication and separation.
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