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婴儿在外表上看来,似乎是成年人的缩影,好像他们之间所不同的只是前者的身体各器官比较小一些而后者的身体各器官大一些而已。其实事实上并不如此,小儿比起成年人大多数的器官远未发育健全,不论在解剖方面或是生理方面和成年人都有很大的差别。由初生儿到二周岁以前,我们称之婴儿期,二岁到五岁为幼儿期。婴儿和幼儿二期均为小儿阶段。本文就是结合高中人体解剖生理学课本(人民出版社出版,第四版。以下均同)来谈谈小儿时期几个主要生
Babies appear to be microcosms of adults as if they were different, except that the former’s organs and organs are smaller and the latter’s organs and organs are larger. Actually, this is not the case. Pediatric organs are far from being developed than most adults, and they differ greatly in anatomy and physiology from adults. From birth to age two, we call infancy, two to five years old. Both infants and young children are in the infancy stage. This article is combined with high school human anatomy and physiology textbooks (People’s Publishing House, fourth edition. The following are the same) to talk about several major children in the period