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循環系統由血液、心臟和血管所組成。 血液能運送身體各部位營養;心臟是血液循環的幫浦;體熱由血液帶到身體其他部位。血液由紅血球、白血球、血小板與血漿所組成,其各自扮演不同角色與功能。



消化系統中的消化道器官由上而下依序為: 口腔、咽、食道、胃、小腸、 大 腸、肛門,消化系統由口腔開始,食物經咀嚼、吞嚥至胃部,經小腸消化及吸收,最後大腸負責吸收水分,剩餘即糞便,送到直腸經肛門排出。

泌尿系統包括腎臟、輸尿管、膀胱、 尿道。


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