1 / 10

KEY CONCEPT Flatworms, mollusks, and annelids belong to closely related phyla.

Explore the characteristics, reproductive systems, and classifications of flatworms, mollusks, and annelids, including their body structures and digestive tracts. Discover the uniqueness of each phylum in the animal kingdom.

robbyt
Télécharger la présentation

KEY CONCEPT Flatworms, mollusks, and annelids belong to closely related phyla.

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. KEY CONCEPTFlatworms, mollusks, and annelids belong to closely related phyla.

  2. reproductive system eyespot head pharynx mouth sucker gut cavity Flatworms are simple bilateral animals. • Flatworms have a solid body and incomplete or absent gut. • There are three classes of flatworms. • planarians

  3. Flatworms are simple bilateral animals. • Flatworms have a solid body and incomplete or absent gut. • There are three classes of flatworms. • planarians • flukes

  4. Flatworms are simple bilateral animals. • Flatworms have a solid body and incomplete or absent gut. • There are three classes of flatworms. • planarians • flukes • tapeworms

  5. Mollusks and other bilateral animals have a complete digestive tract. A complete digestive tract has two openings: a mouth and an anus. Flatworms are the only bilateral animals without a complete digestive tract. Mollusks are diverse animals.

  6. heart intestine mantle cavity mantle stomach digestive gland radula foot salivary gland mouth anus crop • radula • mantle • ctenidia • Mollusks share at least one of three features.

  7. gastropods • pelecypods (also called bivalves) • cephalopods • Most mollusks are classified into three (of seven) classes.

  8. Mollusks have a variety of reproductive strategies. • Most strategies involve sexual reproduction. • Some species are hermaphrodites.

  9. brain blood vessels hearts muscle mouth digestive tract segment nerve cord Annelids have segmented bodies. • Segmentation refers to the repeated sections of an annelid’s body. • The coelom is a fluid-filled space completely surrounded by muscle.

  10. There are three groups of annelids. • earthworms • marine worms • leeches

More Related