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游弋于海的海龟、慢慢悠悠的陆龟、有点凶残的鳄龟……提起这些形态各异的龟类,除了总习惯把它们统统叫做“乌龟”外,大家印象最深刻的肯定是它们的龟壳了。这个随身携带的移动城堡不仅能防御敌人,还能遮风挡雨、席地而睡……简直就是居家旅行、荒野求生、挑战贝爷的必备之物啊!那这么好的龟壳是怎么长出来的呢?表皮硬化?鳞甲异化都不是,答案绝对让你大吃一惊——龟壳是由骨头长成的!
Sea turtles cruising in the sea, slowly long tortoises, a little cruel snapping turtle ... ... raised these different forms of turtles, in addition to the total habit of all of them are called “Turtle”, we are most impressed by the affirmation of their turtles Shell This carry-on mobile castle not only defends the enemy, but also shelter, sleeping on the ground ... ... is simply home travel, survival of the wilderness, challenge the essential things of Baye ah! That such a good shell is how to grow Scleroderma? Scale dissimilation is not, the answer is absolutely amazing for you - the shell is made of bones!