Blood volume refers to the total blood volume of the human body, accounting for 7% to 8% of body weight.

Blood is composed of plasma and white blood cells

red blood cells

leukocyte

platelets

The volume percentage of white blood cells in whole blood is called hematocrit

Blood color: bright red arteries, dark red veins

Blood specific gravity (relative density) whole blood 1.050~1.060 plasma 1.025~1.030

The viscosity of blood: The viscosity of blood is 4 to 5 times that of water

pH value (normal pH value is 7.35-7.45. Acidosis below 7.35. Alkalosis above 7.45. Life-threatening below 6.9 and above 7.8.

Plasma osmotic pressure: 300mmol/L 770kPa

Water 91%-92%

protein

Inorganic salt

non-protein nitrogenous compounds

other ingredients

Solutions with similar or equal plasma osmotic pressures Isotonic solutions (0.9% Nacl and 5% glucose solution

Solutions with an osmotic pressure lower than plasma Hypotonic solutions

Solutions with an osmotic pressure higher than plasma Hypertonic solutions

Physiological functions of plasma osmotic pressure

Normal adult male red blood cells are (4.5~5.5) ✖️10 12/L, and females (3.8~4.6✖️10 12/L. Hemoglobin content: male 120~160g/L, female 110~150g/L

Function: Transport oxygen and carbon dioxide Plasticity (deformability

Physiological properties: plasticity, suspension stability, osmotic fragility

Production and destruction: Iron production, the main raw material for protein synthesis of hemoglobin, maturation factors: folic acid and vitamin B12. Average lifespan of destruction is 120 days

Normal 4.0～10.0✖️109/L

Main functions: phagocytosis, immunity, defense, protection

Classification and function

Normal value 100-300✖️109/L

Physiological properties

Physiological function

blood clotting

blood clotting process

Anticoagulant system contains anticoagulant substances antithrombin and heparin

fibrinolysis

fibrinolysis inhibitor

The total blood volume of a normal adult is equivalent to 7-8% of body weight

blood type