PPT-Mollusks (Mollusca)

Phylum Mollusca 2 Phylum Mollusca Polyplacophora Gastropoda Bivalvia Scaphopoda Cephalopoda Phylum Mollusca 3 Molluscs Have adapted to a wide variety of habitats Terrestrial marine benthic and accomplished swimmers. The . mollusks. are invertebrate animals known as . Mollusca. . . There are more than 150,000 species within this phylum.. Types of Molluscs. snails . clams . squid . cuttlefish . octopus which are among the most neurologically-advanced invertebrates. Welcome to Discovery Education Player. Characteristics of flatworms. Soft, flattened worms with tissues and internal organ system. Simplest animals to have three embryonic germ layers. Bilateral symmetry . Unit 4. Mollusk Introduction. Phylum Mollusca . Molluscus. . = . soft. Soft-bodied animals that usually have an . internal. or . external . shell.. Includes . snails. , slugs, clams, . squids. , and octopi. Tough Softies!. Kingdom: . Animalia. Phylum: . Mollusca. . (Mollusks). Class: . Bivalvia. . (Bivalves). Class: . Cephalopoda. . (Cephalopods) . Class: . Gastroboda. . (Gastropods). Mollusca. is the second most diverse (second most number of species) phylum in the animal kingdom!. Prepared by : Nada H. Lubbad. Introduction. :. Soft bodied animals.. - . name from Latin word “ mollus” meaning soft.. The second largest phylum.. The scientific study of Mollusks is . . Mollusks. Characteristics of Mollusks. These are soft-bodied invertebrates, have bilateral symmetry, and usually 1 or 2 shells. . Most mollusks live in water, but a few live on land.. Examples are: snails, clams, and squid. . Phylum Mollusca. Includes . snails and slugs, oysters and clams, and octopuses and squids. .. Bivalves. Nautilus. Soft-bodied. invertebrate. Covered with protective . mantle. that may or may not form a hard, . 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. General Characteristics of Mollusks. 2nd . largest animal phylum ~100,000species. Extremely . diverse, so why are they all classified under the same phylum?. 1) They all start off as a TROCHOPHORE. This . Categories of Benthic Animals. >1 mm . macrobenthos. <.1 mm . microbenthos. Between .1 and 1 mm . meiobenthos. Major Taxonomic Groups of Benthos. Porifera. Coelenterata. Hydrozoa. Platyhelminthes. Bilaterally symmetrical (Bilaterally asymmetrical in some). Unsegmented. Usually has a definite head (. cephalized. ). Protostomes/. Spiral Cleavage. Coelom mainly a heart cavity. Characteristics of Phylum Mollusca. https://. www.youtube.com. /. watch?v. =_2iXHBuSIJY. Phylum Mollusca, Class . Gastropoda. Phylum Mollusca, . Class . Cephalopoda. https://. www.youtube.com. /. watch?v. =os6HD-sCRn8. Phylum Annelida. I. What is a Mollusk?. A. Phylum . Mollusca. Origin: from Latin . Molluscus. = soft. B. Contains animals that look and act very differently from each other. C. Mollusks: Soft-bodied animal that have an internal or external shell. Aquatic Mollusks. Video: Monster Inside Me, Snail: . http://www.animalplanet.com/tv-shows/monsters-inside-me/. Mollusks, Generally. “Mollusk” means soft. They are soft bodied animals with an internal .