coelomától

Coelomata, also known as coelomates, is a major group within the animal kingdom. This classification refers to animals that possess a true coelom, which is a fluid-filled body cavity derived from the mesoderm. This coelom is located between the digestive tract and the body wall. The presence of a coelom is a significant evolutionary development, allowing for greater complexity in body structure and organ systems. It provides space for organs to develop and move independently, facilitates circulation and excretion, and acts as a hydrostatic skeleton, aiding in locomotion.

Animals within the Coelomata group are triploblastic, meaning their embryos develop from three primary germ layers: ectoderm, mesoderm, and endoderm. The coelom itself forms within the mesoderm. This group encompasses a vast majority of animal phyla, including well-known groups like Annelida (segmented worms), Mollusca (mollusks), Arthropoda (arthropods), and Echinodermata (echinoderms), as well as the Chordata, which includes vertebrates. The evolutionary divergence within Coelomata is extensive, leading to the incredible diversity of animal life observed today. Understanding the coelom and its implications is fundamental to comprehending animal body plans and evolutionary relationships.