Question

The blood exhibits pseudo-plastic behavior and its viscosity decrease with the increase of shear

Answer 1

Hemorheology, also spelled haemorheology(from the Greek ‘αἷμα, haima "blood" and rheology), or blood rheology, is the study of flow properties of blood and its elements of plasma and cells. Proper tissue perfusion can occur only when blood's rheological properties are within certain levels. Alterations of these properties play significant roles in disease processes.[1] Blood viscosityis 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] Because of that, blood behaves as a non-Newtonian fluid. As such, the viscosity of blood varies with shear rate. Blood becomes less viscous at high shear rates like those experienced with increased flow such as during exercise or in peak-systole. Therefore, blood is a shear-thinningfluid. Contrarily, blood viscosity increases when shear rate goes down with increased vessel diameters or with low flow, such as downstream from an obstruction or in diastole. Blood viscosity also increases with increases in red cell aggregability (see below).

Answer 2

Answer:

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Blood cells are of 3 types:

1. Red blood cells: Transpors oxygen

2. White blood cells: protect against diseases

3. platelets: recover body injuries