我们每个人手指都有指纹。指纹是手指末节内侧表面的皮肤乳突排列而成的花纹结构,这个结构中间部位由一个称为三角的区域内中心花纹、外围线和根基组成。按中心花纹和三角的形状,指纹可分为三大类:(1)弓形纹———形状如弓;(2)箕形纹———形状如簸箕;(3)斗形纹———形状如烟 Each of our fingers has a fingerprint. The fingerprint is the pattern structure of the skin papillae arranged on the inner surface of the distal segment of the finger. The middle part of this structure is composed of a central pattern called the triangle, the outer line and the base. According to the central pattern and the triangular shape, fingerprints can be divided into three categories: (1) bow-shaped patterns --- shaped like bows; (2) 箕-shaped patterns --- shaped like 簸箕; (3) bucket-shaped patterns --- shape Smoke