1 / 11

Phylum Mollusca

Phylum Mollusca. Peterson, Science. Phylum Mollusca. Who are they? Divided into three Classes Gastropods Bivalves Cephalopods Lets take a look at some examples…. Phylum Mollusca. Class Gastropods = “stomach foot” Examples: Snails and slugs Abalone Garden Snail Tuchan Snail.

merritt-shields
Télécharger la présentation

Phylum Mollusca

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Phylum Mollusca Peterson, Science

  2. Phylum Mollusca • Who are they? • Divided into three Classes • Gastropods • Bivalves • Cephalopods • Lets take a look at some examples…

  3. Phylum Mollusca • Class Gastropods = “stomach foot” • Examples: Snails and slugs • Abalone • Garden Snail • Tuchan Snail

  4. Phylum Mollusca • Class Bivalves = “2 shells” • Examples: Clams, oysters, scallops, mussel… • Clam • Scallops • Mussel • Oyster

  5. Phylum Mollusca • Class Cephalopods • Examples: Octopus, cuttlefish, squid… • Octopus • Squid • Nautilus

  6. Phylum Mollusca • Gastropods • How do they eat? • Radula – tongue-like organ with rows of teeth • Some are herbivores, carnivores, scavengers… • How do they move? • Rhythmic contractions of muscular foot • Slide on mucus

  7. Phylum Mollusca • Gastropods • Do they have a shell? • Most do (coiled) - snail • Some don’t - slug • Adaptations • Can live in water or on land • Can have a “trap door” • Other Interesting Facts • Mucus helps them slide • Largest mollusk group

  8. Phylum Mollusca • Bivalves • How do they eat? • Filter-feeders (strain food from water) • Gills capture food as they breathe (mucus) • How do they move? • Scallops – open/close shells • Clams can burrow • Most adults don’t move much

  9. Phylum Mollusca • Bivalves • Do they have a shell? • Yes (DUH) – hinged, 2-part shell • Adaptations • Live in water • Can burrow or open/close to escape • Other Interesting Facts • Oysters/mussles can make pearls when irritated

  10. Phylum Mollusca • Cephalopods • How do they eat? • Catches food with tentacles/suckers • Predators/Carnivors • How do they move? • Jet propulsion (balloon like) • Octopus - creeps

  11. Phylum Mollusca • Cephalopods • Do they have a shell? • Some do (i.e. nautilus and squid) • Adaptations • Adapted for swimming • Large, well-developed head and brain • Other Interesting Facts • Closed circulatory system • Fast = squid 6m/s

More Related