Answer:
Spindle fibre→a cellular formatin which consists of microtubules, it is formed between two centrioles that are on cellular poles
Atral ray/ astral spindle fibre→a type of microtubule which is part of the cellular spindle fibre system
Explanation:
Spindle fibreis a cellular bipolar fibrillar structure constructed by proteins, myosin and actin. Microfilaments made from these proteins bind to the centromeres of the chromosomes. This allows chromosomes to separate and to be part of the new cellular material.
Astral spindle fibres/ raysare created around the centrioles in the cell and are bound to the cell membrane. It is considered that the role of these microtubules is to separate chormosomes to cell poles with the help of spindle fibres. The second role is to ensure the position of centriols in the cell.
