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Transcript of Sea Angel
eggs in open sea
must fertilize the woman
connected to mother
born without calcium shell Skylar, C. (2007, 12 20). Sea angel; invertebrate; polar ocean . Retrieved from http://animania-daily.livejournal.com/6093.html Sea angels eat sea butterflies, which are mollusks. Sea angels are also mollusks, which means they eat their relatives... in a sense. The food travels through a very unique digestive tract in that it doubles back on itself. This means that the mouth and anus are at the same end, and the digestive tract "doubles back." The tract itself is just one long tube the continues throughout the body then ends close to where it began. Oceanside Meadows Inn. (unknown). Mollusks. Retrieved from http://www.oceaninn.com/the-nature-preserve/mollusks/ Ramel, G. (Unknown). The phylum mollusca. Retrieved from http://www.earthlife.net/inverts/mollusca.html Circulatory It has a heart and aorta, but is an open circulatory system. The blood is pumped to cavities that surround the organs, and the blood then diffuses where it is needed through the thin membranes of the sea angel. Nervous System Has a circum-oesophageal ring, ganglia, and paired nerve chords. The ring is simply a bundle of nerve tissue surrounding the esophagus. The ganglia is a mass of nerve cells, and the chords are what helps create the sense organs. Basic Information The sea angel is an aquatic animal that lives in the polar waters. Its diet consists of zooplankton and sea butterflies, which are actually related to the sea angel. They use their winglike tentacles to grab prey and stuff it into the mouth, which also happens to be the anus. They are gelatinous, lacking a skeletal system. To protect themselves from predators, sea angels release the pteroenone molecule, which no sea creatures will eat. However, up to 300 animals have been recorded as living on and in the sea angel. Urinary System Sea angels do have a urinary system, but not much of one. They only have kidneys to filter the urine, and they also filter the blood. After the urine is filtered for nutrients, it is put back in with the rest of the waste.