Friday, March 21, 2014

The Arching Sea Star

Photo: Sea star arching its back


Arching Sea Star


Sea stars are remarkable for what they lack. They have no blood, but instead use filtered seawater to circulate nutrients throughout their bodies. They also lack brains, and their nervous systems stretch throughout theirs arms. Sea stars don’t have conventional eyes but “see” with light-sensitive eyespots located at the tip of each arm.












(source:google/http://ocean.nationalgeographic.com/)

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