The rest is a combination of dead and living bacteria (which help to break down food in the gut), protein,
waste material from food,
cellular linings, fats, salts, substances released from the intestines and the liver, and perhaps some insoluble - fiber - rich foods that the body couldn't digest (read: that ear of corn from yesterday's cook -
out).
The purpose of the lymphatic fluid is to feed the cells by carrying vital nutrients to them and to «take the trash
out», i.e. deliver
cellular waste to the bloodstream, from where it's handed over to the kidneys, colon and lungs for elimination.