PPT-Elongate and bilateral with segmented true body cavity (coelom)

Complete circulatory system with capillaries arteries and veins Body wall made of circular and lengthwise muscles Continuous gut running from mouth to anus with own musculature Bristlelike . Chapter 8. Fertilization. The union of male and female gametes to form a zygote.. Fertilization accomplishes two things:. . 1. it provides for recombination of paternal and. . maternal genes (restoring the original diploid . http://www.docstoc.com/docs/79739092/Invertebrates-Section-1. Age of Inverts. Age of Fishes. Age of Reptiles. Age of Mammals. Age of Man. http://hotelcondesdeharo.com/contacto/time-periods-dinosaurs. BSC 2011L. Animal Characteristics. Symmetry. Radiata. – radial symmetry, . diploblastic. (2 tissues). Bilateria. – bilateral symmetry, . triploblastic. Body Cavity. Acoelomates. – no cavity. BASIC CHARACTERISTICS OF ANIMALS:. 1. . 2. . 3. . . . NINE ANIMAL PHYLA. . INVERTEBRATES: . . VERTEBRATES (CORDATES): . (1 phylum). . . The acorn or tongue worm. Natural history. Balanoglossus is marine and inhabits the shallow coastal waters all over the world.. Balanoglossus lives in burrows made in sand or mud . The burrow is usually U-shaped.. phyla: . Platyhelminthes – flatworms (. Gk. ) . plati. . – flat. . . helminth. - worm. Nematoda. – roundworms, . nema. . (. Gk. ) ". thread". Annelida – segmented worms, . . . Molluscs. BSC 2011L. Phylum Annelida. Segmented worms. Circular and longitudinal muscles work against fluid filled . coelom. to produce changes in width and length. Digestion – complete. Circluation. Formation of the Digestive Cavity. At the Blastula stage, the embryo forms a fluid filled ball of cells. During Gastrulation, the blastula caves in on one end to form a Gastrula. The cavity formed by gastrulation will form a digestive cavity or digestive tract.. 1 Animal Body Plans 2 Components of Organisms What are the levels of body organization from simple to most complex? 3 Components of Organisms Cells---- Single cells with specific functions Tissues---- 1. I. . Concept 32.1: What is an Animal?. 2. 95% are invertebrates. Multicellular. Eukaryotic. Heterotrophic (. ingestive. ). Lack . cell . walls. Most are mobile. Diploid with haploid gametes. Sexual reproduction (zygote . Animal Characteristics. Symmetry. Radiata. – radial symmetry, . diploblastic. (2 tissues). Bilateria. – bilateral symmetry, . triploblastic. Body Cavity. Acoelomates. – no cavity. Psuedocoelomates. The . coelom.  allows for compartmentalization of the body parts, so that different organ systems can evolve and nutrient transport is possible. Additionally, because the . coelom.  is a fluid-filled cavity, it protects the organs from shock and compression. Simple animals, such as worms and jellyfish, do not have a . ,. development. of . the. . serous. . membranes. Mark Kozsurek, M.D., . Ph.D. .. ED I., 21/03/2019. Appearance of . the. . common. . pericardio-pleuro-peritoneal. . cavity. .. Isolation of the pleural and peritoneal cavities: the formation of the diaphragm. In biology, . phylum.  . (.  . plural. : . phyla. ). .  is a . taxonomic rank.  below . kingdom.  and above . class. .. phyla can be thought of as grouping organisms based on general specialization of .