You only have to look at a turtle once to realize how different they are from other vertebrates. Where did that shell come from?
Ed Yong looks at turtle anatomy and how this weird configuration evolved from the basic vertebrate plan. Link
The shell itself is made from broadened and flattened ribs, fused to parts of the turtle's backbone (so that unlike in cartoons, you couldn't pull a turtle out of its shell). The shoulder blades sit underneath this bony case, effectively lying within the turtle's ribcage. In all other back-boned animals, whose shoulder blades sit outside their ribs (think of your own back for a start). The turtle's torso muscles are even more bizarrely arranged.
Ed Yong looks at turtle anatomy and how this weird configuration evolved from the basic vertebrate plan. Link
Comments (6)
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the above just explains why coz even if i was a kid back then, it seemed to me like its skin is attached and pulling it out would hurt the being (if it's still alive)
Unfortunately, they sometimes put others in danger, too. Some of those people wandering around in the middle of sports events caused some damage to themselves as well as people who were moving pretty fast. Kind of stupid, really.