Jawapan

2016-08-06T13:44:27+08:00
Kerana jantung mengepam darah ke dalam arteri dan tekanan darah perlu dikekalkan.  
English pls
The muscular wall of artery is thicker because artery transport highly pressures blood pumped out from heart to all parts of body
2016-08-06T21:01:04+08:00
Kerana arteri mengangkut darah berkelajuan laju.