Absolute zero is the coldest possible temperature, at which no heat is left in a substance and its particles display no motion whatsoever. Absolute zero is equal to 0 K on the Kelvin scale, which is... Absolute zero is the coldest possible temperature, at which no heat is left in a substance and its particles display no motion whatsoever.
Serum is plasma that has been allowed to clot. It is prepared in the same way as plasma; however, the blood is collected into a tube with no anticoagulant. While spinning in the centrifuge, the clot moves with the cells to the bottom of the blood collection tube, leaving the serum on top.
Blood serum is essentially the most basic, neutral part of blood, and is often described as plasma with all of its clotting elements removed. It acts as a fluid backdrop for many of bloodâs most important functions, namely transporting red and white blood cells and shuttling minerals, sugars, and fatty acids from one place to the next.