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Sharks - Skeleton. The skeleton of the shark has evolved and adapted to suit and aid the habitat, migration, hunting habits and diet of these acclaimed carnivores. Unlike terrestrial animals, humans, and even other marine animals, sharksâ skeletons are made purely of cartilage and connective tissue, or muscle. There is no bone. This type of skeleton means that the shark is lighter, as cartilage is about half the density of bone. This is important because, unlike other fish, the shark has no swim bladder to prevent it from sinking to the bottom of the ocean.
What are lipids made up of? Lipids are called fatty-acids because they consist of a non-polar tail [ with a fascinating variety of-CH2- lengths ] and an acid head. They are called fats when they are s â¦ traight-chained, or saturated, and they stack like toothpicks; they are solid at room temperature, and are mostly from animal origins.