Climatic zones are distinct areas on the earth that share the same climatic conditions. There are 4 main climatic zones; tropical, subtropical, temperate, and cold climatic zones. These climatic zones are defined by their latitudes. They also have climatic ranges depending on the position of the sun with regard to the earth and its orbit. This is in retrospect of the fact that the earth is utilized 22.5 degrees on its axis.
Answer:
the kidneys
Explanation:
Mammals, many terrestrial amphibians and marine fishes mainly excrete urea and are called ureotelic animals. Ammonia produced by metabolism is converted into urea in the liver of these animals and released into the blood which is filtered and excreted out by the kidneys.
The inside surface area is shaped in a crescent. It consists of a spiral valve which is made up of the small intestine. Although the dogfish shark has a relatively short small intestine compared to other animals, therefore, the spiral valve allows for a more compact form of the small intestine.
Hence, this structure provides maximum surface area over a relatively short distance in order to make the absorption of nutrients efficient achieved from the food, the sharks had from eating different sea animals.
