Sharks have 5 to 20 rows of teeth. They loose worn out teeth about every 8 days. Some new ones grow in. The shark moves its jaw from side to side to chew. This motion helps move the food to the back of its mouth where it can be swallowed whole.
Sharks have a good sense of smell.
They have excellent vision and good hearing. Sharks can also feel vibrations in the water made by other fish. These sharp senses help the shark find food. Young Most sharks are born live. Some sharks have 100 babies at once.