Definition: Invertebrates are animals that do not have a backbone or any other structure for protection, thus allowing them to move freely without the need to adapt their body structures. The term "invertebrate" refers to all organisms that belong to the class Invertebrata, which includes insects, spiders, crustaceans, and many other invertebrates. A vertebrate is an animal that has a backbone, including mammals such as humans, whales, and dolphins. This group of animals are typically characterized by having four limbs (limbs, paws, tail, head) and can breathe air through their respiratory system. Examples of vertebrates include: - Mammals: Humans, dogs, cats, horses, goats - Birds: Chickens, ducks, geese - Fish: Sharks, tuna, crabs Invertebrates on the other hand are animals that lack a backbone. They do not have any internal organs and cannot breathe air through their respiratory system either. Examples of invertebrates include: - Insects: Ants, beetles, spiders - Mollusks: Shrimp, snails, clams - Arthropods: Slugs, slugs, scorpions Invertebrates are also known as the "invertebrate phylum".
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