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当前学科：医学临床三基（护士）
题目：
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心肌细胞根据其形态及功能可分为普通心肌细胞和特殊心肌细胞，前者构成心房壁和心室壁的主要部分，主要功能是收缩；后者具有自律性和传导性，其主要功能是产生和传导兴奋，控制心的节律性活动。分布于心内膜下，与收缩心肌相连（）
A
窦房结
B
房室结
C
房室束
D
左、右束支
E
Purkinje纤维网
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