I just rewatched A Zed and Two Noughts
by Peter Greenaway
(1985) and I am still amazed by the depiction of the two main (twins) characters for decay.
In fact, in this film, they set up a series of biological observation devices that photograph very three seconds an organic body in decomposition in order to compose a accelerated cinematographic piece of its complete putrefaction.
Greenaway actually introduces very quickly in the narrative this obsession as the first sentence pronounced in the film by those characters after the death of their two wives is: “How fast does a woman decomposes ?”.