BIOL 1010 Lecture Notes - Lecture 46: Gastrovascular Cavity, Symmetry In Biology, Nematode
14 May 2017
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Behind the scolex is a long ribbon of repeated units filled with both male & female reproductive structures. Units of the posterior end which are full of ripe eggs break off & pass out the host"s body in feces. The term worm is applied to any slender, elongated vertebrate. Flatworms are just 1 of 3 major animal phyla known as worms. Flatworms & cnidarians differ in symmetry: flatworms are bilateral. o. Cnidarians are radial: but animals of both phyla have a gastrovascular cavity. Section 20. 8 nematodes have a pseudocoelom and a complete digestive tract. Nematodes (roundworms) make up the phylum nematoda. o bilateral symmetry. & an embryo with 3 tissue layers: nematodes are cylindrical with a blunt head. & tapered tail. o range in size from less than. Flatworms, fluid-filled body roundworms cavity (pseudocoelom, not completely lined with mesoderm) & a digestive tract with 2 openings. have.
