( ( The lesson ) ( ( ( describes ( the ( important structures ) ) ) ( ( in ( the ( ( ( male and ) female ) ( reproductive system ) ) ) ) ( , ( and ( how ( ( a zygote ) ( turns ( into ( an ( ( embryo and ) fetus ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN lesson)) (VP (VBZ describes) (NP (DT the) (JJ important) (NNS structures)) (UCP (PP (IN in) (NP (DT the) (ADJP (NN male) (CC and) (JJ female)) (JJ reproductive) (NN system))) (, ,) (CC and) (SBAR (WHADVP (WRB how)) (S (NP (DT a) (NN zygote)) (VP (VBZ turns) (PP (IN into) (NP (DT an) (NN embryo) (CC and) (NN fetus)))))))) (. .)))
The lesson describes the important structures in the male and female reproductive system, and how a zygote turns into an embryo and fetus.
(ROOT (S (NP (DT The) (JJ female) (JJ reproductive) (NN system)) (VP (VBZ consists) (PP (IN of) (NP (NP (NNS structures)) (SBAR (WHNP (WDT that)) (S (VP (VP (VB produce) (NP (NNS eggs))) (, ,) (VP (VB secrete) (NP (JJ female) (NN sex) (NNS hormones))) (, ,) (CC and) (VP (ADVP (RB ultimately)) (VB enable) (NP (NP (NN birth)) (PP (IN of) (NP (DT a) (NN fetus))))))))))) (. .)))