Wrap up/Launch

What is something you learned about the shark today? What is something you still want to know more about sharks?

Sharks differ from boney fish in their internal structure which is made of cartilage instead of bone, tooth like structures on the skin instead of scales, an oily large liver that helps them float instead of a swim bladder, a spiral valve in their small intestine that helps to absorb nutrients, and a spiracle that helps bring water across the gills so less sand and debris enter.

Finish your shark dissection