Transcript Power Point
Squid Dissection Classification of the Squid • Classification: Kingdom Animalia, Phylum Mollusca, Class Cephalopoda, Order Teuthoidea, Families Loliginidae, Sepiolidae, and Architeuthidae. What structures make the squid belong to it’s classification groups? • Kingdom Animalia – Multi-cellular, cells have a nucleus (eukaryotic) • Invertebrate ?: No back bone, not as complex of a body as vertebrates, no skull. • Phylum (See Link) Mollusca (squid, octopus, squid, cuttlefish, nautilus, and ammonite – Class Cephalopod: Cephalopods are a class of fast-swimming mollusk. (Head Footed) • Order : Teuthida, – Family (3 Families: Loliginidae, Sepiolidae, Architeuthidae) » Genus - Species: 300 species Body Organization • What are the five levels of body organization for most advanced and complex multi-celled organisms? 1. Cells: Chromatophores, Fat, Muscle, Nerve etc. 2. Tissues: Fat, Muscle, Epithelial, Nerve, Connective 3. Organs: tentacles, head, eyes, mantle, siphon, fins, beak brain, nerve, mantle, food tube, liver, stomach, gill, heart, ink sac. 4. Organ Systems: Cardio. 5. Organism: Squid Nervous, Reproductive, Digestive, General Characteristics • • • • • • • • • • • Range Squid live throughout the world's oceans at all depths. Size Largest: The giant squid can reach a length of 18 m (60 ft) including tentacles, and weigh up to 900 kg (1980 lbs). Smallest: One species of sepiolid squid only reaches a length of about 1.8 cm (0.7 in), and weighs as little as 700 mg (0.02 oz). Feeding Habits Squid are carnivores; they eat fish, crustaceans, and smaller squid. Offspring Female squid lay thousands of eggs, which attach to foliage or to objects at the bottom of the ocean. Life Span The common squid lives about one to two years. Did You Know Some squid have bioluminescent organs that make them glow in the dark. When being chased, many squid squirt a dark liquid to distract their attacker. Giant squid have eyes the size of basketballs. Squid swim faster than any other invertebrate. Biologists estimate that there are as many as 500 species of squid. Phylum Mollusca • 50,000 Species • Include, Snails, Slugs, Clams, Oysters, Squids, Octopuses, and some others. • All organ systems present • Muscular Foot, Coelam, Open Circulatory System. • Found in the sea, fresh water and land. Class Cephalopod • Description: Cephalopod means "head-foot." The foot of the cephalopod is a cluster of tentacles that connects directly to the head. The brain, the eyes, and the other sensory organs are well-developed. Cephalopods breathe using gills. They swim by jet-propulsion; they rapidly expel water from the mantle cavity through a specialized, tube-like organ called the hyponome. Many can also eject a cloud of ink to confuse enemies. They have Bilateral Symmetry. Exactly how is the squid’s body organized? • Squid • What level of organization is the squid? • What level are the parts you will see inside and outside the squid? • Are the cells, tissues, organs, and systems exactly like the human? Explain. As Food? • Fried calamari: breaded, deep-fried squid. • Many species of squid are popular as food in cuisines as diverse and separated as Korean and Italian. In Englishspeaking countries, it is often known by the name calamari. Individual species of squid are found abundantly in certain areas and provide large catches for fisheries. The body can be stuffed whole, cut into flat pieces or sliced into rings. The arms, tentacles and ink are also edible; in fact, the only part of the squid that is not eaten is its beak and gladius (pen).