Final answer:
Plasma carries various metabolic waste products, including urea, creatinine, and carbon dioxide, which are transported to excretory organs for removal.
Step-by-step explanation:
The question pertains to the waste products in the plasma, which is the liquid portion of blood. Plasma carries a range of materials through blood vessels, including cells, proteins, nutrients, gases, and metabolic wastes. The metabolic waste products carried in plasma include substances such as urea, creatinine, and carbon dioxide. These waste products are byproducts of the body's metabolic processes and are transported to various excretory organs where they can be removed from the body.