mikrotuubulitest koosnev süsteem, tänu mille funktsioneerimisele liiguvad kromosoomid jagunevas eukarüootses rakus metafaasiplaadile e raku ekvatoriaaltasapinnale ning pärast, anafaasis lahknevad tütarkromosoomid raku eri poolustele, In cell biology, spindle apparatus refers to the subcellular structure that segregates chromosomes between daughter cells during cell division. It is also referred to as the mitotic spindle during mitosis or the meiotic spindle during meiosis.