Characteristic features of coelom, Biology

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Characteristic Features of Coelom

Sensory system consisting of eyes, photoreceptor cells, statocysts, taste buds and tactile organs.
Respiration by skin, gills or parapodia.
Body vermiform, bilaterally symmetrical with metamerism.
Chitinous setae present
Schizocoelic coelom - coelom appearing as a split or cavity within mesoderm.
Blood vascular system closed, often along with retory pigments; plasma contains
Sexes may be separate, or animals may be hermaphrodites. Cleavage spiral, with mosaic development. When present, larva is trochophores. Some animals show asexual reproduction by budding.
Presegmental prostomium and post segmental pygidium.
Nervous system contains a supraesophageal ganglion (cerebral ganglion). Circum oesophageal ring and ventral nerve cord with segmental ganglia.
Excretory system usually consisting of a pair of nephridia in each segment.
Different degrees of cephalization are shown.

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