Informative Speech About Sharks Research Paper

there are a lot of types of sharks in different shapes and sizes. But maybe you are wondering what they have in common or similar features of sharks. well, am going to tell you about the common features and characteristics of sharks. First I and going to tell about their appearance, or how they look. All sharks are made up of cartilage. A tough rubbery type of skin. Their skin being made of cartilage makes it easy for them to turn and menuver there boodies. Also if they get bitten it is easier for them to heal. Inside the shark is a double chambered shark heart a double chambered heart means that it has double circulation for blood. Sharks have no swim bladder. A swim bladder is a parachute type origin found in fish but not sharks. It helps