Description
在昆虫世界里，跳蛋是不折不扣的跳跃冠军。根据科学家的测量和记录，跳蚕跳高的世界纪录是22厘米，跳远是33厘米，这一跳就是自已身长的百倍，真是令人惊叹。这也是为什么人们把它称为"跳蚤"的原因。为什么跳蚤能跳那么高呢？跳蚤之所以具备惊人的跳跃本领，是因为跳蚤的后足非常发达，足的长度比整个身子都要长，而且特别粗壮。跳跃前，跳蛋肌肉发达的腔节紧靠着腿节，然后用力收缩强大的腔节提肌，缩得越紧，伸展开来的力量就越强，跳得也就越高。这跟挥拳击打的原理是一样的，先把手臂收缩曲起，然后再击出去力量就会更大。与其他善跳昆虫相比，跳蚤的跳跃还有一个明显的不同点：它的中足和前足也能够后蹲，用来协调整个身子的跳跃动作，这样，就更增强了它跳跃的力量。
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