Organ systems in different groups of animals exhibit various patterns of complexities. Explain.
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Organ systems in different groups of animals exhibit various patterns of complexities. Explain.
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In animals like annelids, arthropods, molluscs,
echinoderms and chordates, organs have associated to
form functional systems, where each system is
concerned with a specific physiological function. This
pattern is called organ system level of organisation.
Organ systems in different groups of animals exhibit
various patterns of complexities.
For example, the digestive system in platyhelminthes
has only a single opening to the outside of the body that
serves as both mouth and anus and is hence called
incomplete. A complete digestive system has two
separate openings, mouth and anus.