( ( ( Red ( blood cells ) ) ( -LRB- ( Erythrocytes -RRB- ) ) ) . )
(ROOT (NP (NP (JJ Red) (NN blood) (NNS cells)) (PRN (-LRB- -LRB-) (NP (NNP Erythrocytes)) (-RRB- -RRB-)) (. .)))
Red blood cells (Erythrocytes).
(ROOT (S (NP (NNP Red) (NN blood) (NNS cells)) (VP (VBP are) (NP (DT the) (RBS most) (JJ numerous) (NN blood) (NNS cells))) (. .)))