Because of there sharp teeth.
No. The maximum speed of a Great White Shark is 40 km/h and no human has ever swum faster than that.
If by Leopard Shark you mean Triakis semifasciata then no, the Mako Shark is faster.
It is highly unlikely for a human boy to be born with the innate abilities to swim faster than a shark. Sharks are incredibly fast and efficient swimmers, adapted for life in the water in ways that humans are not.
A shark is much faster than a crocodile.
Yes - much faster.
No, turtle blood won't heal a wound any faster than human blood, which under normal conditions should already be in the wound. Just let your body do what it does and heal on its own, and don't go hurting any turtles for folk magic.
no, the arms mend faster
A baby would heal faster with chickenpox than an adult, in general.
The tiger shark eats more humans than the great white shark
That depends on the sise of the shark
The Upper limb heals faster than the Lower limb, this is because there is more blood flow at the Upper, so basically where there is more blood the faster they heal.
I no!