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Sigma KEE - Feather

羽毛

Each instance of this class is one of the structures that make up the external covering of Birds.

Relationships
Parents	动物解剖结构	AnatomicalStructures that are possessed exclusively by Animals.
	身体部位	A collection of Cells and Tissues which are localized to a specific area of an Organism and which are not pathological. The instances of this Class range from gross structures to small components of complex Organs.