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(8分)仔细观察心脏结构图(见下图),回答下列问题。
(1)填出图中所示结构的名称:
①  _________ ②__________③___________ ④___________⑤_________⑥__________
(2)在心脏的四个腔中,充满静脉血的有_________(填名称),充满动脉血的有_______
(3) 在心房和心室之间有⑦         ,保证血液只能从          流入            。 
(4)某护士将葡萄糖针剂从小华前臂静脉输入体内,请填出由上肢静脉滴入的葡萄糖到达下肢组织细胞时,所经过的主要结构顺序(填名称):
葡萄糖针剂→小静脉 →上腔静脉→_______ →右心室________ →肺部的毛细血管→_______→ ________ →左心室_________→ 下肢静脉下肢组织细胞。
(1)左心房 、左心室 、 右心房 、 右心室 、 主动脉 、 肺动脉 
(2)右心房 右心室 、 左心房 左心室
(3)房室瓣、  心房  、心室  (4 )右心房 、 肺动脉 、肺静脉、  左心房 、主动脉解析:
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