The term describes the liquid portion of blood that remains after the blood has clotted and the blood cells have been removed?

The term describes the liquid portion of blood that remains after the blood has clotted and the blood cells have been removed?

• A. Plasma
• B. Lymph
• C. Urine
• D. Serum

Answer: (D)

Serum is the liquid part of blood that remains after it clots and the cells are removed. When blood is allowed to clot, the clot forms from fibrin and trapped cells, and the remaining liquid becomes serum, which lacks clotting factors like fibrinogen. Plasma, by contrast, is the liquid portion obtained when blood is collected with anticoagulants, so it still contains clotting factors. Lymph and urine are not blood; lymph comes from the lymphatic system, and urine is produced by the kidneys. Therefore, the described liquid portion is serum.

Serum is the liquid part of blood that remains after it clots and the cells are removed. When blood is allowed to clot, the clot forms from fibrin and trapped cells, and the remaining liquid becomes serum, which lacks clotting factors like fibrinogen. Plasma, by contrast, is the liquid portion obtained when blood is collected with anticoagulants, so it still contains clotting factors. Lymph and urine are not blood; lymph comes from the lymphatic system, and urine is produced by the kidneys. Therefore, the described liquid portion is serum.