Bryozoa

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by LordSnow
Last updated 5 years ago

Discipline:
Science
Subject:
Biology

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Bryozoa

Phylum:Bryozoa

- Bilaterally Symmetrical-Body has more than two layers, tissue and organs- body posseses a U-shaped gut with an anus-a ring of tentacles around the mouth called the lophophore-tentacles are lined with cilia-look like coral but not related-Hard colonial exoskeleton-almost all are colonial-some zooids are modified into pincerlike structures capable of snapping shut on trespasser

BryozoaBry~o~zo~a[Brah-uh-zoh-uh]-Bryon; greek for moss-Zoon; greek for animal

Physical Characteristics

-All Bryozoans are hermaphadite (male/female)-they can reproduce both sexually and asexually-asexual reproduction is common and colonies tend to spread & grow by budding and fragmentation

Reproduction

Feeding/nourishment

-Bryozoans use their tentacles and a pattern of ciliary feeding called metachormal waves. -The cilia beat and move water through the tentacles , and in doing so, they capture food particles by entrapping them in a small invisible stream of water that carries them to the mouth-they also feed on bacterial particulates and smaller phytoplankton

Membranipora membrancea (beat up left, beat downright)

Ecological interactions

-hydroids may be symbiotic with the bryozoan, getting food brought to them in thecurrents generated by the bryozoan, while at the same time the bryozoan benefits by gettingsome protection from the nematocysts in the hydroids. -natural preadators are nudibranchs, sea urchins, many crustaceans, small sea spiders and flatworms-Bryozoans serve as part of the ocean's natural filtrationsystem, straining out the excess food & debris particels

Use/impact on humans

- Bagula Neritina, prioducesa chemical caleed bryostatin. It is not known what it does for living bryozoan but researchers have found that it could be used to fight against Leukemia and a number of other cancers

Miscellaneous

-Bryozoans are common space- occupying oeganisms on shallow water rock or hard substrata throught the world mainly tropics-Colonies have been observed tto be on surfaces of seaweeds, mulluscs, turtles, and sea snakes-Bryozoans come from a lophotrochozoan ancestor; and are related to Branchiopoda and phoronida


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