( ( ( The structure ) ( formed ( by ( ( ( the centrosomes ) and ) ( the microtubules ) ) ) ) ) ( ( is ( named ( ( ( ( ( mitotic spindle ) , ) ( due ( to ( its ( characteristic shape ) ) ) ) ) , ) ( holding ( ( the chromosomes ) ( between ( the ( two centrosomes ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN structure)) (VP (VBN formed) (PP (IN by) (NP (NP (DT the) (NNS centrosomes)) (CC and) (NP (DT the) (NNS microtubules)))))) (VP (VBZ is) (VP (VBN named) (NP (NP (JJ mitotic) (NN spindle)) (, ,) (ADJP (JJ due) (PP (TO to) (NP (PRP$ its) (JJ characteristic) (NN shape)))) (, ,) (VP (VBG holding) (NP (NP (DT the) (NNS chromosomes)) (PP (IN between) (NP (DT the) (CD two) (NNS centrosomes)))))))) (. .)))
The structure formed by the centrosomes and the microtubules is named mitotic spindle, due to its characteristic shape, holding the chromosomes between the two centrosomes.
(ROOT (S (NP (DT A) (JJ mitotic) (NN spindle)) (VP (VBZ forms) (PP (IN from) (NP (DT the) (NNS centrosomes)))) (. .)))
A mitotic spindle forms from the centrosomes.