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Discover the fascinating world of animal embryonic development and types of symmetry. Learn about the diverse phyla like Porifera, Cnidaria, Platyhelminthes, Nematoda, Annelida, Arthropoda, and Echinodermata. Understand how the circulatory system works in Mollusca and the unique toothlike scraping device they possess. Dive into the segmented structure of Annelida and the characteristics of Arthropoda - the diverse group of insects. Gain insights into Echinodermata, the spiny-skinned marvels of the animal kingdom. Delve into body cavities - coelomate with a peritoneum lining, pseudocoelomate with a false cavity, and acoelomate with no cavity at all. Explore how these different structures impact the development and functions of these creatures. Start your journey into the intricate world of animal anatomy and physiology today!
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Coelm: body cavityFluid filled space in multicellular animals • Coelomate animals: true cavity: with a complete lining called peritoneum derived from mesoderm • Pseudocoelomate animals have a pseudocoel: • “false cavity” • tissue derived from mesoderm only partly lines the fluid filled body cavity of these animals. • All pseudocoelomates are protosomes • Acoelomate animals, like flatworms, have no body cavity at all. Organs have direct contact with the epithelium.
Mollusca “The Mollusks”