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Echinodermata

Echinodermata. TEAM LEEEEEEE. Number of Germ Layers. Echinodermata are triploblastic 3 germ layers. Class aseroidera - sea star. Symmetry. Radial symmetry Evolved from bilateral. Class ophiurodoiea - brittle star. Coelem. Coelomates Large body cavity lined with tissue.

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Echinodermata

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  1. Echinodermata TEAM LEEEEEEE

  2. Number of Germ Layers • Echinodermata are triploblastic • 3 germ layers Class aseroidera- sea star

  3. Symmetry • Radial symmetry • Evolved from bilateral Class ophiurodoiea- brittle star

  4. Coelem • Coelomates • Large body cavity lined with tissue Class echinoidea- sea urchin

  5. Digestive Tract • Mouth and anus • Some diffuses waste from respiratory surfaces Class echinoidea- sand dollar

  6. Cephalization • No cephalization • Diffuse network of nerves and neurons around the mouth

  7. Segmentation • Not segmented Class holothuroidea- sea cucumber

  8. Skeleton and Appendages • Endoskeleton • Usually have multiple of 5 appendages around center of the body (if they have appendages) Class concentricycloidea- sea daisy

  9. Circulatory & Respiratory System • Open circulatory system(blood does not travel within blood vessels) • Water vascular system • For movement, food, and waste transportation, and respiration • Canals connecting numerous tube feet • Contract muscles and force water into tube feet, causing them to extend and push against ground

  10. Reproduction • Most are separate sexes and some are hermaphrodites • External fertilization • Mostly sexual but can reproduce asexually • Can regenerate body parts

  11. Habitat • All marine animals • Live in salt water • Sessile or slow moving Class crinoidea- sea lilies/feather stars

  12. VIDEO • SURPRISE

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