The part of organism's anatomy or substance arising from an organism from which the biomaterial was derived, excludes cells. E.g. tissue, organ, system, sperm, blood or body location (arm).

A well defined and circumscribed subdivision of an organism, not any arbitrary part. Macroscopic organism parts may be delimited mainly by natural boundaries but always exhibit at least small regions of fiat boundaries. An organism part may derive from an organism, i.e. it may continue to exist even when the organism does not exist any longer.

part of

• organ