( Platelets ( ( are ( ( those ( little ( anuclear cells ) ) ) ( in ( ( the blood ) ( that ( ( stick together ) ( to ( ( plug up ) ( tears ( in ( blood ( vessel walls ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Platelets)) (VP (VBP are) (NP (NP (DT those) (JJ little) (NN anuclear) (NNS cells)) (PP (IN in) (NP (NP (DT the) (NN blood)) (SBAR (WHNP (WDT that)) (S (VP (VBP stick) (ADVP (RB together)) (S (VP (TO to) (VP (VB plug) (PRT (RP up)) (NP (NP (NNS tears)) (PP (IN in) (NP (NN blood) (NN vessel) (NNS walls)))))))))))))) (. .)))
Platelets are those little anuclear cells in the blood that stick together to plug up tears in blood vessel walls.
(ROOT (S (NP (NNS Platelets)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT the) (NN cell) (NNS fragments)) (VP (VBN involved) (PP (IN in) (NP (NP (NN blood) (NN clotting)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP stick) (PP (PP (TO to) (NP (NP (NNS tears)) (PP (IN in) (NP (NN blood) (NNS vessels))))) (CC and) (PP (TO to) (NP (DT each) (JJ other)))))))))))))) (. .)))