Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals...

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Chapter 23 Invertebrate Diversity

Transcript of Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals...

Page 1: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Chapter 23

Invertebrate Diversity

Page 2: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

23.6 Echinoderms

A. What are echinoderms? spiny-skinned animals with five-

part radial symmetry, an internal skeleton, a water vascular system, and suction cup-like structures called tube feet

live in the ocean

Page 3: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

23.6 Echinoderms

B. Body Plan of Echinoderms 1. five symmetrical parts organized

around a center 2. water vascular system:

internal network of fluid-filled canals

a. madreporite: connects system to the outside

Page 4: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

23.6 Echinoderms

B. Body Plan of Echinodermsb. ring canal: circles the digestive system in center

c. radial canals: extend into each body segment

d. tube feet: attached to radial canals; act like suction cups

Page 5: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Echinoderm anatomy

Page 6: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

23.6 Echinoderms

C. Form & Function 1. Feeding: use tube feet to pry

open bivalve mollusks; some eat algae; others eat detritus

2. Respiration: occurs through tube feet

3. Internal Transport: digestive glands and body fluids

Page 7: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

23.6 Echinoderms

C. Form & Function 4. Excretion: tube feet 5. Response

a. no head; primitive nervous systemb. eyespots sense light or darkc. Protection: hiding; spines ineffective defense

6. Movement: tube feet and muscles

Page 8: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Tube Feet

Page 9: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

23.6 Echinoderms

C. Form & Function 7. Reproduction

a. sexual; separate sexes or hermaphrodites

b. asexual; regeneration abilities

Page 10: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Regeneration

Page 11: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Regeneration

Page 12: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,
Page 13: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Brittle Star

Page 14: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Sea Urchin

Page 15: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Sea Urchin Skeleton

Page 16: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Sand Dollar and Sand Dollar Skeleton

Page 17: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Sea cucumber

Page 18: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Sea cucumber

Page 19: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Feather star

Page 20: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Feather star

Page 21: Chapter 23 Invertebrate Diversity. 23.6 Echinoderms A. What are echinoderms? spiny-skinned animals with five- part radial symmetry, an internal skeleton,

Crinoid