Unformatted text preview: tube) • Circulatory system = central ring and five radial vessels, but no heart • sexually mature after approximately two to three years, eggs and sperm cells are released into open water, where fertilization takes place (except for some species of starfish) • Some echinoderms (starfish) can regenerate. From one missing arm, it can generate a completely new starfish. • Feeding - filter-feeders, STARFISH – invert stomach…engulf food, digest it once, then send it to the second stomach to digest it again…ok...
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- Spring '08
- Biology, Sea urchin, completely new starfish, invert stomach…engulf food