{"id":21807,"date":"2022-11-10T00:00:00","date_gmt":"2022-11-09T23:00:00","guid":{"rendered":"https:\/\/c01.purpledshub.com\/bbcwildlife\/?post_type=purple_issue&p=21807"},"modified":"2022-11-21T10:20:45","modified_gmt":"2022-11-21T09:20:45","slug":"origin-of-pieces-4","status":"publish","type":"post","link":"https:\/\/c01.purpledshub.com\/bbcwildlife\/2022\/11\/10\/origin-of-pieces-4\/","title":{"rendered":"Origin of pieces"},"content":{"rendered":"\n
AN ANATOMICAL MISCELLANY <\/span><\/strong><\/h5>\n\n

A starfish\u2019s madreporite <\/h4>\n\n
\"\"
The white circle lets seawater into the starfish<\/figcaption><\/figure>\n\n

LOOK CLOSELY AT A STARFISH AND YOU might spot a tiny exquisite imperfection in its otherwise flawless five-fold symmetry. This beauty spot is called a madreporite, a roughly circular chalky plate that sits slightly off-centre on a starfish\u2019s upper surface. Dotted with microscopic pores, it works as a seawater intake valve that supplies a system of tubes powering the countless hydraulic tube feet on the animal\u2019s underside.<\/p>\n\n

Stuart Blackman <\/strong><\/p>\n\n

STARFISH: TIM GAINEY\/ALAMY<\/p>\n","protected":false},"excerpt":{"rendered":"

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