yes, me too, I thought the ones I titled with "flukes" are the "spiders and cottonballs", if they are not bursted. I had them look like the cottonballs too, but took only pictures of the whole ones. This must be the "Fasciola Hepatica", because they are not so big.
Maybe the strange looking stuff could be a bursted giant fluke? Because the pieces are quite big. And the "testes" are these little "arms" one can see on the picture?