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Mollusks
Mollusks
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Mollusks

  1. 1. MOLLUSKS
  2. 2. PHYLUM MOLLUSCA •Mollusks are soft-bodied invertebrates with most of them covered by a shell. •They have complex respiratory, reproductive, circulatory, digestive and excretory systems functioning together for their survival.
  3. 3. THREE BODY PARTS •Muscular foot – used for locomotion •Mantle – produces the shell •Visceral mass – contains the internal organs
  4. 4. THREE CLASSES •Gastropods •Bivalves •Cephalopods
  5. 5. GASTROPODS •Also called UNIVALVES because they only have one shell. •They are mostly marine with freshwater and terrestrial members. •Those living in seas have gills for breathing and those on land use the lining of their mantle as lungs.
  6. 6. LIMPET
  7. 7. SNAIL (suso)
  8. 8. SLUGS (kuhol)
  9. 9. ABALONE
  10. 10. NUDIBRANCHS
  11. 11. BIVALVES •These mollusks consist of two shells attached to each other •Some are attached to rocks while others remain in the sand or mud •They use their mantle cavity to feed by trapping suspended particles in water and for gas exchange
  12. 12. MUSSELS (tahong)
  13. 13. OYSTERS (talaba)
  14. 14. CLAMS (halaan)
  15. 15. TRIDACNA (taklobo)
  16. 16. CEPHALOPODS •These organisms have internal skeleton •Some have external skeleton while others are shell-less •They are the most active mollusks, moving very fast using arms and tentacles in catching prey
  17. 17. SQUID (pusit)
  18. 18. CUTTLEFISH
  19. 19. CHAMBERED NAUTILUS
  20. 20. OCTOPUS
  21. 21. Many mollusk species are utilized as food like tahong (mussels), talaba (oysters), halaan (clams), scallops, and kuhol or suso to name some. Other species are made into decorative items
  22. 22. Golden Kuhol, however, has become a pest to rice and other crops. They eat a lot of plant leaves and reproduce rapidly.
  23. 23. The giant African snail Achatina fulica was found to be an intermediate host to a rat lungworm that causes meningitis.
  24. 24. ACTIVITY Name the following organisms and classify if they are gastropods, bivalves or cephalopods

Hinweis der Redaktion

  • Octopus - cephalopod
  • Snail - gastropod
  • Mussels- bivalve
  • Abalone - gastropod
  • Clams - bivalve
  • Cuttlefish - cephalopod

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