A drop of each of the following, is placed separately on four slides. Which of them will not coagulate?
(a) Blood plasma
(b) Blood serum
(c) Sample from the thoracic duct of lymphatic system
(d) Whole blood from pulmonary vein
Correct option (b) Blood serum
Explanation
Serum will not coagulate if placed separately on a slides. This ts because in. blood, the serum is the component that does not contain blood cell (WBCs or RBCs) nor any clotting factor. It is the blood plasma without the fibrinogens.
