What is serum primarily constituted of after the clot is made?

The composition of serum after the clot is made primarily involves a clear liquid that results from the process of coagulation. When blood is allowed to clot, the cellular components and clotting factors, including fibrinogen, are consumed in the formation of the clot, which is a mass of solid elements. The remaining liquid portion, known as serum, is devoid of these clotting factors and cells.

Thus, the primary component of serum after clot formation is a clear fluid that contains proteins other than fibrinogen, electrolytes, hormones, and waste products, but not the coagulated components. This makes it distinct from coagulated blood, which includes the solid formed elements.

Therefore, focusing on the primary constituents post-clot will help clarify that serum is not a coagulated mass but rather the liquid that separates from the clot, containing various proteins and nutrients but lacking those involved in coagulation.