温馨提示
详情描述
Echinodermata是什么意思，Echinodermata翻译
Echinodermata: A Unique Group of Marine Animals
Echinodermata is a diverse phylum of marine animals that includes starfish, sea urchins, and sea cucumbers. These fascinating creatures are characterized by their spiny exoskeletons and radial symmetry. With over 7000 known species, echinoderms can be found in various marine environments around the world.
The earliest known echinoderms date back to the early Ordovician period, approximately 450 million years ago. Fossils of these primitive creatures reveal a remarkable evolutionary history. Over time, echinoderms diversified and adapted to a wide range of ecological niches. Today, they can be found in diverse habitats, from shallow coastal waters to the deep seafloor.
One of the most remarkable features of echinoderms is their unique water vascular system. This complex network of canals and tube feet allows them to perform essential functions such as feeding, respiration, and locomotion. The system begins with a series of fluid