Description: Invertebrates are a diverse group of animals characterized by the absence of a backbone. This term encompasses a wide variety of organisms, including insects, arachnids, mollusks, crustaceans, and annelids, among others. Invertebrates represent approximately 95% of all known animal species, making them the largest and most diverse group in the animal kingdom. They are often classified into different phyla, each with unique characteristics that distinguish them. For example, insects, which belong to the phylum Arthropoda, are known for their exoskeleton, three pairs of legs, and, in many cases, wings. On the other hand, mollusks, which include snails and octopuses, are characterized by their soft bodies and, in many cases, a calcareous shell. The diversity of forms and adaptations of invertebrates allows them to inhabit almost all ecosystems on the planet, from deep oceans to arid deserts. Their ecological importance is fundamental, as they play crucial roles in pollination, decomposition, and as part of food webs. Additionally, many invertebrates are indicators of environmental health, making them subjects of study in biology and conservation.
