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BLOOD
• Blood is the fiberless connective tissue formed of 55% plasma and 45% formed elements (RBC,WBC,Platelets).
• Blood is slightly alkaline(pH=7.4).
• The specific gravity of blood is about 1.055

PLASMA :
• Plasma forms the matrix of blood.
Plasma has:
92% water
78% protein
0.51% ions

Plasma Protein :
Albumin = maintain osmolarity
Globulin = Help in defence
Fibrinogen = Help in clotting
Prothrombin = Help in clotting
Ions :
Na+,K+,Cl,HCO3, sulphate,phosphate, calcium etc.

RBC / erythryocytes :
• Site of formation of RBC= bone marrow
• Normal RBC count in males = 5.5 million/mm³
• Normal RBC count in females = 4.55 million/mm³