1 / 12

Echino = “spiny” Dermis = “skin”

Echino = “spiny” Dermis = “skin”. Some different echinoderms. Unifying Characteristics. Spiny Skin Internal Skeleton – “ endoskeleton ” Water vascular system Muscular tube feet (suction cup feet) Pentaradia Symmetry 5 rays of symmetry. Water Vascular System.

alijah
Download Presentation

Echino = “spiny” Dermis = “skin”

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. Echino = “spiny” Dermis = “skin”

  2. Some different echinoderms

  3. Unifying Characteristics • Spiny Skin • Internal Skeleton – “endoskeleton” • Water vascular system • Muscular tube feet (suction cup feet) • Pentaradia Symmetry • 5 rays of symmetry

  4. Water Vascular System • Madreporite - sieve-like opening to the water vascular system

  5. Water Vascular System • Functions: • Respiration • Ring & Radial Canals • Tube Feet • Circulation • Ring & Radial Canals • Movement • Tube Feet

  6. Tube Feet • Each tube foot is basically a suction cup, muscles pull up the centre of the cup causing suction • Many feet working together can exert huge force, allowing “walking” and attacking

  7. Groups of Echinoderms • Sea Urchins and Sand Dollars • Grazers and Detrivores • Solid plates protect internal organs • Brittle Stars • Filter feeders and Detrivores • Slender/Flexible arms – detach and distract • Sea Cucumbers • Detrivores • Eviscerate themselves as defence! • Sea Stars • Predatory • Regenerative if dismembered! • Sea Lilies and Feather Stars • Filter Feeders • Feather dusters of the sea

  8. Sea Urchins and Sand Dollars • Grazers and Detrivores • Solid plates protect internal organs

  9. Brittle Stars • Filter feeders and Detrivores • Slender/Flexible arms – detach and distract

  10. Sea Cucumbers • Detrivores • Eviscerate themselves as defence!

  11. Sea Stars • Predatory • Regenerate if dismembered!

  12. Sea Lilies and Feather Stars • Filter Feeders • Feather dusters of the sea

More Related