Question

What is the name of the straw colored fluid left after clotting of blood?

Answer 1

The straw colored liquid portion of blood, also called as blood plasma is derived when all the blood cells i.e. red blood cells (RBC), white blood cells (WBC) and platelets are separated from whole blood. The remaining straw colored fluid that is plasma is $90 - 92\%$water, but it contains critical solutes that are necessary for sustaining health and life.

Complete answer:
The liquid part of the blood that is plasma serves as a transport medium for delivering nutrients to the cells of the various organs of the body. It also transports the waste products derived from cellular metabolism to the kidneys, liver and lungs for excretion. It is also involved in the transport system of blood cells and maintaining normal blood pressure.
Plasma helps to distribute heat throughout the body and to maintain biological stability, including acid-base balance in the body and homeostasis. The homeostasis is any self regulating process by which biological systems tend to maintain stability while adjusting to the conditions that are optimal for survival.

Additional information: The important constituents of plasma include the electrolytes such as sodium, potassium, chloride, bicarbonate, magnesium and calcium. In addition to this, there are some more substances like amino acids, vitamins, organic acids, pigments and enzymes that are found in traces. The endocrine system also secretes hormones such as insulin, corticosteroids and thyroxine directly into the bloodstream.
Plasma contains about $6 - 8\%$ proteins. Out of which very important group is of coagulating proteins and their inhibitors. When blood clotting is activated, fibrinogen circulating in the blood is converted into fibrin, which in turn helps to form a stable blood clot at the site of vascular disruption.

Note: The biochemical testing of plasma and serum is an important part of the clinical diagnostics and treatment. For example, the low or high concentration of glucose in plasma or serum helps to confirm serious disorders such as diabetes mellitus and hypoglycemia.