The halakhah does not generally permit autopsies, due to honoring the dead. However, there are two important exceptions to that rule.
Kohanim were forbidden to come into contact or share indoor space with the bodies of the dead, apart from their closest of relatives.
What do I do when I go to a shivah? Remember that conversation should be about the deceased, not the mourners or the visitors.
What are the Jewish laws and rituals regarding funerals? Generally, a ritual washing, burial, and a funeral, each with their own customs.