"arthropod" 的定义和意义

What is "anthropod"?

Arthropod refers to a large group of invertebrate animals that are characterized by their segmented bodies, exoskeletons, and jointed appendages. This group includes insects, arachnids, crustaceans, and many other organisms. Arthropods are the most diverse group of animals on Earth, with over a million known species, and they occupy a wide range of habitats, from deep ocean trenches to the highest mountaintops. Some of the most well-known arthropods include spiders, ants, crabs, and butterflies. Despite their differences, all arthropods share some common features, such as a hard outer shell and a segmented body. These adaptations have allowed arthropods to thrive in a variety of environments, making them one of the most successful groups of organisms on the planet.