Jawapan

2015-02-07T17:38:49+08:00
Sistem peredaran darah is a sistem let the blood transport oxygen from lung to all part of body for body cell undergo cellular respiration
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2015-02-09T18:00:48+08:00
- mengangkut oksigen ke sel-sel badan dan mengangkut bahan-bahan tercerna ke seluruh badan