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Of all fluids, gases have the lowest viscosities, and thick liquids have the highest. The values listed in this article are representative estimates only, as they do not account for measurement uncertainties, variability in material definitions, or non-Newtonian behavior. Kinematic viscosity is dynamic viscosity divided by fluid density.
Viscosity is a measure of a fluid's dynamic resistance to a change in shape or to movement of its neighboring portions relative to one another. [1] For liquids, it corresponds to the informal concept of thickness; for example, syrup has a higher viscosity than water. [2]
Blood viscosity is determined by plasma viscosity, hematocrit (volume fraction of red blood cell, which constitute 99.9% of the cellular elements) and mechanical properties of red blood cells. Red blood cells have unique mechanical behavior, which can be discussed under the terms erythrocyte deformability and erythrocyte aggregation. [2]
This list may not reflect recent changes. List of viscosities; Viscosity; B. ... Non-Newtonian fluid; R. Reduced viscosity;
per red blood cell 27-32 picograms Hexosephosphate P 1.4-5 × 10 −5: 0-2 × 10 −6: Histamine: 6.7-8.6 × 10 −8: Histidine: 9-17 × 10 −6: 1.1-3.8 × 10 −5: Hydrogen ion(pH 7.4) 4 × 10 −11: beta-Hydroxybutyric acid: 1-6 × 10 −6: 1-9 × 10 −6: 17α-Hydroxycorticosteroids: 4-10 × 10 −8: 17α-Hydroxyprogesterone: male 20-250 × ...
η(δ) = viscosity of blood in the wall plasma release-cell layering; r = radius of the blood vessel; δ = distance in the plasma release-cell layer; Blood resistance varies depending on blood viscosity and its plugged flow (or sheath flow since they are complementary across the vessel section) size as well, and on the size of the vessels.
The main intravascular fluid in mammals is blood, a complex mixture with elements of a suspension (blood cells), colloid , and solutes (glucose and ions). The blood represents both the intracellular compartment (the fluid inside the blood cells) and the extracellular compartment (the blood plasma). The average volume of plasma in the average ...
The formed elements are the two types of blood cell or corpuscle – the red blood cells, (erythrocytes) and white blood cells (leukocytes), and the cell fragments called platelets [12] that are involved in clotting. By volume, the red blood cells constitute about 45% of whole blood, the plasma about 54.3%, and white cells about 0.7%.