U.S. to Central America or Mexico
Answer:
You must be taking an test. Anyways the interesting thing about the heart it is the size of an adult fist.
A warmup is to prepare gently before a physical performance. A cool down is to do exercise at a lower intensity. They are similar because you can do the same thing for each, such as doing a few stretches, jogging a lap or two, maybe even taking a few deep breaths.
