小朋友,你们知道为什么长大后同龄的男孩普遍比女孩高吗?国外医学家调查后发现,同龄男女躯干的长短都是差不多的,可是下肢的长短却有很大区别。因此科学家们指出,下肢骨骼的发育是男女身高差异的重要因素所在。原来,男女自出生至青春期之前,骨骼的发育呈波浪式的增长,每年增高3-7厘米不等,身高没有多大的差别。 Children, do you know why boys of the same age are generally taller than girls? Foreign medical scientists found that the length of the torso of men and women of the same age are similar, but the length of the lower limbs are very different. Therefore, scientists pointed out that the development of lower extremity skeleton height difference between men and women is an important factor. It turned out that men and women from birth to puberty, the growth of the skeleton showed a wave of growth, an annual increase of 3-7 cm range, height is not much difference.