Sharks

Shark Anatomy 1.Liver 2.Spiral valve 3.Heart 4.Pancreas 5.Stomach 6.Eye 7.Nostril 8.Ampullae of Lorenzini 9.Teeth 10.Pectoral Fin 11.Pelvic Fin 12.Anal Fin 13.Caudal or Tail Fin 14.Second Dorsal Fin 15.First Dorsal Fin 16.Gills Skeleton The bones of a fish are made mostly of calcium, but a shark doesn't really have any bones. A shark skeleton is made of cartilage. Bony fish have a gas-filled swim bladder which enables them to float in the water, but sharks have no such bladder. Since cartilage is lighter than bone, it helps to keep a shark from just sinking to the bottom of the ocean. A shark doesn't have as many moveable parts as a bony fish, which in some ways makes a shark a little more clumsy. But cartilage is more flexible than bone, so a shark can turn around in a smaller space than a bony fish. Sharks keep growing cartilage as long as they live, and have extra mineral deposits in their jaws where they need extra strength, (the better to bite you with). Shape W...

These are some pictures collections about Shark attack victims : Shark Attack Victims

Shark Drawings Of course, living sharks don't just remain stretched out straight, like a fish at a sea food shop. They wriggle! They bend and bow and arch. And their pectoral and caudal (tail) fins change position as they move. You can add the illusion of liveliness to your shark drawings by modifying the basic method you've already learned. Instead of starting with an oval, start with a sort-of 'bent' oval — a kind of bean-shape. For example, you can bend your 'bean' downward, as shown here. You can extend the lines on either the head or tail end in the same or different directions, as long as the result seems believable. Because sharks have two pectoral fins, you can increase the three-dimensional (3-D) quality of your drawings by showing part of the pectoral on the other side of the body. Try bending your 'bean' upwards and extend the head and tail parts of your shark in a way that makes sense to you. What about the pectoral fins from this angle? If y...