心脏由左心室 左心房 四个腔组成.只有同侧的心房和心室是相通的同侧的心房和心室之间有 存在瓣膜的作用是 .左心室与 相连右心室与肺 Template




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tomski心脏由左心室 左心房 四个腔组成.只有同侧的心房和心室是相通的同侧的心房和心室之间有 coloring