Jawapan

2016-10-10T23:59:18+08:00
Plasenta .. membekalkan nutrient kpd fetus dan melindungi fetus..
persenyawaan cuma berlaku time fasa subur kerana sewaktu fasa subur pengovulan berlaku. jadi gamet jantan dapat bersenyawa dgn gamet betina.. kalau bukan time fasa subur, pengovulan x berlaku means ovum x dak.. jadi mcamana persenyawaan nak berlaku..
Jawapan Paling Bijak!
2016-10-10T23:59:28+08:00
Placenta
-make sure the blood of mother and foetus never mixed together
-acts as the exchange surface of nutrients and oxygen between mother and the foetus
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