The physical force exerted by a fluid on a structure is HYDROSTATIC PRESSURE . The main pressure is the BLOOD hydrostatic pressure, which pushes materials OUT OF the capillary. The other main force regulating filtration and reabsorption is OSMOTIC PRESSURE , which refers to the "pull" of water into an area by osmosis due to the HIGHER relative concentration of solutes.
The antibodies that can bid to large parasites are IgE. IgE is a type of antibody synthesized by plasma cells and has only been found in mammals. If you have an allaergy, the immune system overeacts to an allergen by producing antibodies IgE. These antibodies travel to cells that release chemicals, causing an allergic reaction.
The smallest particle that an element can be divided into is the atom, which is the smallest unit of anything.
I believe the answer you are seeking is feedback loop
