Properties of Blood
1. Amount
Blood constituents about 7-9% of all body weight or 97ml/kg of body weight
Average man; 5-6 liter of blood
Average female; 4-5 liter of blood
Normal range of haemoglobin in man; 13.8- 17.2 grams per deciliter (g/dl)
in female; 12.1 to 15.1 grams per deciliter
2. Viscosity (thickness)
Blood viscosity is measurement of thickness and stickiness of individual blood.
A blood contain RBC (erythrocytes) which constituent to thickness of blood.
Increased blood viscosity can caused by increase in RBCs and also cause slower the flow.
3.Specific gravity
Specific gravity or density of blood is between 1.045 and 1.065 compared with 1.000 for water.
4. Colour
Red colour of arterial blood is due to oxygenated haemoglobin.
When O2 is removed,the blood appear bluish and dark WBCs and platelets in blood are clear and plasma is yellowish.
5.pH
Blood is slightly alkaline with pH that usually ranges between 7.35 -7.45
Arterial blood is more alkaline than venous blood because it has less O2.
5. Temperature
Temperature of blood averages about 100.4 °F which us slightly higher than normal body temperature.
7. Salinity
The salt concentration of blood is about 0.85% Nacl.
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