Final answer:
Plasma and serum are both components of blood, but they have differences. Plasma contains water, substances for maintaining the body, and coagulation factors. Serum is the plasma component without the coagulation factors.
Step-by-step explanation:
Plasma and serum are both important components of blood, but they have some differences. Plasma is the liquid component of blood that contains 90 percent water and various substances needed for maintaining the body's pH, osmotic load, and protection. It also contains coagulation factors and antibodies. On the other hand, serum is the plasma component without the coagulation factors. It is similar to interstitial fluid and contains proteins, electrolytes, lipids, antibodies, and other substances.