asters are the radiating rays surrounding the centrioles. while the fibres appearing between two daughter centrioles are called spindle fibres...
spindle fiber disease
spindle fiber
If the spindle fiber were disrupted, the duplicated chromosomes would not be separated.
During metaphase each chromosome attaches to spindle fibers. The centriole anchors the spindle fibers and helps in splitting the chromosome.
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Spindle Fibers are formed between centrosomes. Centrosomes migrate to opposite ends of the cell during cell division. The spindle fibers function is to anchor the centrosomes and chromosomes into the poles. The chromosomes then reel them selves in using the spindle fiber.
chromosomes
spindle fiber
the kinetochore
spindle fiber disease
intrafusal fiber muscles embedded with the spindle along side the normal muscle fibers (extrafusal fiber muscles)
kinetochore microtubules bind with spindle fibers.
spindle fiber
Spindle fiber is made of clusters of aggregated microtubules. The spindle fibers will form at opposite poles of a cell during the prophase in mitosis.
If the spindle fiber were disrupted, the duplicated chromosomes would not be separated.
at anaphase 2. IN matephase 1 the spindle fiber attach to one spindle fiber. in anaphase 2 they attach to two spindle fibers then divide and move to opposite ends of the cell. now each is an individual chromosone
I believe that they are formed by the Centrioles in the cell. These centrioles are found inside (encased) in the centrosomes. They combine microtubles and associated proteins (such as Aurora A) to strengthen the spindle fibers.