sharks used it for dressing leather and as a source of vitamin A
SHARKS.
SHARKS.
sharks
to help keep buoyancy
to help the shark stay afloat
sharks used it for dressing leather and as a source of vitamin A
Sharks do not have swim bladders, which are organs found in bony fish that help regulate buoyancy. This absence allows sharks to control their depth in the water column by using their large, oil-filled livers.
Dogfish sharks, like other sharks, have a unique buoyancy system primarily due to their large livers, which are filled with oil. This oil is less dense than water, helping to counteract their weight and providing neutral buoyancy. Their cartilaginous structure also contributes to their ability to maintain buoyancy while swimming. Overall, these adaptations allow dogfish sharks to navigate efficiently in their aquatic environment.
Oil is stored in shark's livers because livers store oil (or fat). When vertebrates digest food, the food does not go from their intestine to the blood stream but to the liver which decides what to do with it. That includes you. The liver sends some food directly to the blood stream. It gives some additional processing, and rather that release all the food that came through the digestive track at one time it stores some. (Besides that it serves other functions.) If your body suddenly needs more fat than usual, your liver will release it. If the need continues for any length of time, your body will instruct your fat cells to start releasing fat. Sharks work the same way.
So it can stay warm. Espacaily when it travels. Sometimes you can see them before they stick their fin up.So does that awnser your question?
Radium is not stored in oil.
Cartilaginous fishes store oil in their large, oily livers. The liver serves as a buoyancy aid, helping these fishes control their depth in the water column. Additionally, the oil stored in the liver provides a concentrated energy reserve for these species.