BLOOD -

1. Blood is a mobile connective tissue composed of a fluid, the plasma and the cells, the blood corpuscles.
2. Blood is basis of life.
3. Blood is the softest tissues in the body.
4. Fluids outside the cells are generally called extracellular fluids (ECF).
5. Blood forms about 30-35 percent ofthe ECF.
6. The volume of blood in an adult person of 70 kg weight is about 5.5 litres.
7. It is a slightly alkaline fluid having pH 7.4. pH of blood in arteries is more than in veins.

COMPOSITION -

Blood is composed of a watery fluid called plasma and floating bodies termed formed elements (e.g., blood corpuscles).