1 / 10

Platyhelminthes: Fat Worms

Platyhelminthes, also known as flatworms, are soft, unsegmented creatures with internal organ systems and tissues. Considered the simplest animal to have three embryonic layers, bilateral symmetry, and cephalization, these creatures exhibit a range of fascinating characteristics. They feed by extracting bodily juices from prey using a scolex mouth, absorb nutrients through diffusion, and eliminate waste through complex structures like flame cells. While they lack a complex nervous system, they respond to stimuli through muscle cells or cilia depending on their habitat. Flatworms reproduce both sexually and asexually, often featuring hermaphroditic traits with reproductive organs stored in proglottids. This diverse group includes classes like Trematoda, Cestoda, Planarians, and Monogenea.

slocum
Download Presentation

Platyhelminthes: Fat Worms

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. Soft, unsegmented, flattened worms with internal organ systems and tissues • Simplest animal to have three embryonic layers, bilateral symmetry, and cephalization Platyhelminthes: Fat Worms By Mikinley, Maddie, Merritt

  2. Bilateral Symmetry Bilateral

  3. Debris and tissues of dead or almost dead animals • Feed by extracting bodily juices from prey using scolex mouth that can latch on to food Feeding Detritivore: animal which feeds off of dead organic materials

  4. Diffusion Circulation

  5. Food goes through the mouth and is digested using its pharynx in a Gastrovascular Cavity Excretion Flame Cells

  6. Complex structures • External environment • Does Not have a complex nervous system • CNS runs between two nerve cords on both of its sides Response

  7. Those that live on land use muscle cells to move body • Those that live in water use cilia to swim Movement Muscle Cells and Cilia

  8. Reproduce both sexually and asaexually • Both the male and female reproductive organs can be found in a single flatworm (Hermaphrodite) • These organs are stored in the proglottid Reproduction

  9. Diffusion • No lungs or circulatory system • Cells close to the surface of the skin Respiration

  10. Trematoda • Cestoda • Planarians • Monogenea Name of classes and example 4 major classes

More Related