Library · Histology
Blood Histology
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Blood histology looks different from the histology of a solid organ. Picture a liquid sample where erythrocytes, leukocytes, and platelets float in plasma instead of forming permanent walls or layers.
Plasma and serum are not exactly the same. Plasma is the liquid part of blood. Serum is the fluid that remains after blood has clotted, once fibrinogen and several clotting factors have been used up.
In brief
Blood histology examines a connective tissue whose cells do not form fixed layers: erythrocytes, leukocytes, and platelets remain suspended in plasma.
Plasma is the liquid matrix of blood. Serum is the fluid left after blood clots, and it lacks fibrinogen and most of the factors consumed in clot formation. The distinction between plasma and serum depends on whether clotting has already occurred in the sample.
Sources (1)
- National Center for Biotechnology InformationPhysiology, Blood PlasmaPublished
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