INVERTEBRATES Introduction: Animalia is the largest of the five kingdom system, with over one million species. It has an extreme variety of shapes, colors, and sizes. It is made up of eukaryotic, multicellular, heterotrophic organisms that are either aquatic or terrestrial and reproduce sexually or asexually. Invertebrates are a type of animal that have no backbone. They make up for about 97% of the animal kingdom. Some invertebrates are earthworms, butterflies, jellyfish, and giant squid. There …showed first 75 words of 3445 total…

…showed last 75 words of 3445 total…has five radii. 5.What is their support? They have an endoskeleton. 6.What's a water-vascular system? A network of water filled canals. 7.What are tube feet? Small, moveable protrusions that aid in movement, feeding, respiration, and excretion. 8.How do they reproduce? Sexually or asexually. 9.What are the five classes? Crinoidea, asteroidea, ophiuridea, echinoidea, and holothuroidea. 10.What systems do echinoderms lack that are very important in most evolved animals? They have no circulatory, respiratory, or excretory systems.