First, there are about 460 identified shark species dwelling in our oceans at this time. It belongs to a household of fish whose skeletons encompass cartilage fairly than bone. Cartilage is a way more versatile and lighter tissue than bone. In us people, cartilage is in sure elements of our physique, together with our ears and nostril. This materials makes sharks extra sturdy as they traverse the oceans and discover the ocean flooring.
A shark’s pores and skin additionally has properties value inspecting. The shark’s pores and skin consists of a set of scales that act because the exoskeleton for the fish species. This, along with the fish’s cartilage tissue, permits the shark to maneuver simply by the ocean and preserve power when it’s wanted most. Sharks, like different fish, have gills to breathe underwater. They normally have about 5 to seven gill slits positioned on both facet of their physique. These gills filter the ocean water to acquire the oxygen obligatory for these creatures to outlive. You may consider these gills because the shark’s “lungs”.