WebSegmented worms (phylum Annelida) are the most complex animals with worm-like body plans. A study of worms can illuminate a possible history of how some organ systems and body features evolved. Fig. 3.35. ( A) A whale shark ( Rhincodon typus; a vertebrate animal) Image courtesy of Tanaka Juuyoh, Flickr Fig. 3.35. WebAnnelids, mollusks, arthropods, echinoderms, and chordates are all eucoelomates. A third group of triploblasts has a slightly different coelom lined partly by mesoderm and partly by endoderm. Although still functionally a coelom, these are considered “false” coeloms, and so we call these animals pseudocoelomates.

Phylum Annelida Biology for Majors II - Lumen Learning

WebAug 1, 2012 · Arthropods. Members of the phylum Arthropoda, having a hard exoskeleton and jointed appendages. Includes insects such as Drosophila melanogaster, along with crustaceans, myriapods and chelicerates. Chordates. Members of the phylum Chordata, principally distinguished by the possession of a notochord at least at some point in their … WebNov 29, 2024 · Annelid and arthropod bodies are distinguished by their body segmentation. When segmented animals reach the stage of development in which their body plan is … higian

Which phylum is most closely related to the arthropods?

WebProtostomes include arthropods, mollusks, and annelids. Deuterostomes include more complex animals such as chordates but also some simple animals such as echinoderms. These two groups are separated based on which opening of the digestive cavity develops first: mouth or anus. WebEmbryology and Phylogeny in Annelids and Arthropods describes the embryology of segmented invertebrates, utilizing morphological facts of embryonic development in the furtherance of speculations ... Includes clinical cases and follow-up questions in each chapter that help relate key principles to everyday practice, aid in problem-based learning ... Webpage 952 Annelid worms include earthworms and leeches, but most species of annelids live in the oceans. page 952 Mollusks include gastropods (snails, slugs), cephalopods (squid, octopuses), and bivalve mollusks (clams, oysters). page 953 Ecdysozoans include several phyla, notably the nematodes and arthropods, that molt their cuticles. page 956 ... higiena cytat