CHEETAH: The cheetah is quite literally built for speed. Its body is long and streamlined with a highly flexible, spring-like spine. Its spine allows the cheetah to throw its hind paws farther forward than normal, adding about 11 percent to its stride length. The spine also acts as a coil for the back legs, whipping them forward quickly for fast acceleration. The cheetah's long, slender legs, small, floating collarbones and vertical shoulder blades give it great range of motion, further lengthening its stride. Its short, wide nasal passages are designed to take in lots of oxygen quickly during sprints. It has oversized arteries and lungs to increase the amount of oxygen transferred to the bloodstream. It's no wonder that the cheetah is the fastest animal on land.
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