Seen in the 80s and possibly French in origin.
There were two series with many of the same animated characters in different roles. In particular there was one old man with antennae and a huge beard that covered all his body and a group of people with large noses representing bad people.
The two series covered what went on in the human body, with tiny humans instead of blood cells etc and another about space travel, with theme music from J S Bach.
It was a childhood favourite and I can’t remember it at all!