“I don’t know why they get as old, but I hope someone will find out,” Nielsen said. Lowe, in an email, said “the rule of thumb is deep and cold = old when it comes to fishes.” Some invertebrates have a soft body, while others have a hard outer skin or shell. What do sharks and rays have in common with your nose They are from the class Chondrichthyes, which means cartilaginous fish. This includes giraffes who have VERY long spines Their necks can be 6 1/2 feet long, but theyre still made up of just seven bones. There are two types of backbone structures: the trunk vertebrae.
The backbone also supports the production of blood cells and platelets. It protects their soft organs and spinal cord, helps them swim, and attaches to their muscles. The spine is one of the most vital structural components fish have. All mammals, except some sea cows and sloths have seven bones in their necks. While most fish have a backbone, some don’t. The cold water and the slow metabolism that comes with it might have something to do with their long lives, Nielsen said. Invertebrates are animals without backbones. Believe it or not, most animals dont have backbones - mammals are one of the few groups that do. A shark's skeleton is different because it is cartilage instead of bone, but sharks do have spines.No sharks do not have a backbone. Snakes can have anywhere between one-hundred and four-hundred vertebra, dependent on their size and their means of killing their prey. All fish are vertebrates and they have backbones. Snakes’ long backbones (spines) are made up of many individual vertebrae. Greenland sharks love cold water - preferring temperatures near freezing - and are all over the Arctic. All snakes are vertebrates, and therefore all snakes have a backbone, the size of a snakes’ spine is dependent on the size of the snake. He wasn’t part of the study, but praised it as creative and compelling. While not surprised that Greenland sharks live a long time, “I’m really shocked by the magnitude of that longevity,” wrote Christopher Lowe, director of the shark lab at California State University Long Beach. Tapeworms live in the digestive tract of many vertebrates including human beings. Annelids have special organs of excretion called nephridia. Earthworms are considered as farmers’ friend of farmers. An ocean quahog, a clam, lived 507 years and two different types of sponges are said to survive for 15,000 and 1,500 years. Tapeworm and liver fluke live in the intestines of human beings and cattle. Some animals without backbones live longer.
“But the study is convincing enough for us to say that these animals live way longer than human beings and possibly longer than any other vertebrate,” said Magalhaes, who runs the longevity database and wasn’t part of Nielsen’s team. Joao Pedro Magalhaes, a University of Liverpool aging researcher, said because the study is based on an indirect measurement he wouldn’t necessarily concentrate on exact numbers, especially when they exceed 400 years, where the upper end of the margin of error goes.
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