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Sea Star Anatomy

Sea Star Anatomy

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Sea Star Anatomy

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  1. Sea Star Anatomy External

  2. Water enters water vascular system (Arms) Central Endoskeleton; ossicles

  3. A depression which contains tube feet Extensions of water vascular system; ampullae contracts for motion Endoskeleton; ossicles

  4. Internal Anatomy of Sea Star Digestive gland

  5. Sea Star Anatomy Questions • The mouth of a sea star is located on the ____________ surface. The anus and madreporite are located on the __________ surface. • Ventral; dorsal • What is the function of the madreporite (sieve plate)? • Regulate water into water vascular system

  6. Sea Star Anatomy Questions • What is the function of the pedicellarias? • Respiration; wave action keeping skin free of debris • What are the eyespots of a sea star able to sense? • Light • What are the extensions of the water-vascular system called? • Tube feet

  7. Sea Star Anatomy Questions • List the four functions in which tube feet aid: • Respiration; locomotion; excretion; feeding • What do sea stars eat? • clams, oysters and fish • What is the function of the skin gills? • respiration

  8. Sea Star Anatomy Questions • Describe the feeding process of a sea star • push stomach through mouth and engulfs prey and brings it back • The mouth of a sea star is located on the ventral surface. Why is that an adaptive advantage for the sea star? • Sea stars are carnivorous and detritus feeders; majority of food attaches to rock, i.e. coral polyps, clams)