Mollusca dunia hewan


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Mollusca dunia hewan

  1. 1. ANIMALIAStandar KompetensiSiswa mampu m emahami prinsip-prinsip pengelompokkanmakhluk hidup.Kompetensi Dasar2.6 Mendeskripsikan ciri-ciri filum dalam dunia Hewandan peranannya bagi kehidupanIndikator Mengenal ciri-ciri umum animalia. Mengidentifikasi karakteristik berbagai filum anggota kingdom animalia. Menyajikan data (gambar, foto, deskripsi) berbagai ivertebrata yang hidup di lingkungan sekitarnya berdasarkan pengamatan. 1
  2. 2. Phylum MOLLUSCA Class Polyplacophora - Chiton
  3. 3. Phylum Mollusca Class Scaphopoda – Tusk Shells
  4. 4. Phylum Mollusca Class - Gastropoda
  5. 5. Phylum Mollusca Class Gastropoda - Nudibranch
  6. 6. Phylum Mollusca Class – Gastropoda - Nudibranchs
  7. 7. Phylum Mollusca Class – Sea Hare
  8. 8. Class Gastropoda whelks
  9. 9. Class - Gastropoda Conch
  10. 10. Class Gastropoda Limpets and Periwinkles
  11. 11. Class - Gastropoda Abalone
  12. 12. Class - Gastropoda Land Snail
  13. 13. Class Bivalvia Clams, Mussels,Scallops
  14. 14. Class - Cephalopoda Squid Octopus
  15. 15. Class Cephalopoda Octopus
  16. 16. Class Cephalopoda Nautilus
  17. 17. Characteristics of Molluscans Size – Millimeter to 60 Feet (18M) Major Food source Lifestyle Simple - Limpets Complex – Squid and Octopi
  18. 18. Molluscan Body Plan Visceral Mass Foot Adductor Muscles Siphons Gills
  19. 19. Circulatory System Open Circulatory System Means that not all the blood is contained in vessels but rather vessels AND open chambers called sinuses Sinuses take place of the Capillaries 3 chambered heart
  20. 20. Body Systems Respiration – this is accomplished thru the circulation of oxygen-rich water by the MANTLE Excretion – this is accomplished by Kidneys that double as a passageway for eggs or sperm Nervous System – varies with species. Limpets and Bivalves are simple, Cephalopods are well developed.
  21. 21. Comparison of Body Plans
  22. 22. Specialized Structures Radula – Horny-toothed structure found within the pharynx Used for “Rasping” or “Scraping” plant or animal tissue Bivalves are filter feeders and have lost this structure Cephalopods, in addition, have a “Beak” which work together to kill prey
  23. 23. Specialized Structures Operculum – A protective plate that covered the opening to the shell of some gastropods Siphon – A tube that allows for water to enter/leave the body of a Mollusc. Bivalves and Cephalopods Siphuncle – a cord of tissue that connects all the chambers of the Nautilus and used for boyancy
  24. 24. Specialized Sturctures Nacre – secretion around sand particles by oysters resulting in a pearl. Hectocotylus – a special structure on one of the arms of an Octopus (male) that allows it to deposit sperm packets into the females mantle cavity
  25. 25. Hectocotylus
  26. 26. Specialized Structures Shells – Not all mollusc’s produce them Make of calcium carbonate which is obtained from water or soil. They can grow through the lifetime of the animal
  27. 27. Reproduction Varies tremendously from external fertilization to internal, dioecious and hermaphrodidic Changing Sex – some such as oysters change back and forth from male to female releasing sperm and eggs accordingly. Spermatophores – packets of sperm