Blood fluids are a type of bodily fluid that is composed of cells and proteins suspended in a liquid. The four crossword solutions for the term blood fluids are SERA (4 letters), SERUMS (6 letters), PLASMAS (7 letters), and PLASMS (6 letters). Sera is a type of serum, which is a clear, yellowish liquid that contains antibodies and other proteins. PLASMAS are a type of blood fluid that is made up of water, proteins, lipids, and electrolytes. Plasms are a type of plasma that is made up of proteins, lipids, and electrolytes.