Human remains means a deceased human body or any portion of a deceased human body, except:
(i) Clean, dry bones or bone fragments; human hair; teeth; fingernails or toenails; or
(ii) A deceased human body and portions thereof that have already been fully cremated prior to import; or
(iii) Human cells, tissues or cellular or tissue-based products intended for implantation, transplantation, infusion, or transfer into a human recipient.
42 CFR § 71.50
The purpose of this subpart is to prevent the introduction, transmission, and spread of communicable human disease resulting from importations of various animal hosts or vectors or other etiological agents from foreign countries into the United States.