Blood is a red coloured liquid that circulates in our body or in the body of all organisms. Blood have red colour because it contains a red pigment called haemoglobin in its red cells. Blood is a connective tissue. Blood consists of four things: plasma, red blood corpuscles, white blood corpuscles and platelets. Thus, the main components of blood are :
- Red Blood Corpuscles (or Red Blood Cells),
- White Blood Corpuscles (or White Blood Cells), and
There are about 5 million red cells in one drop of blood. Plasma is a liquid (which is also called fluid Matrix) and the three types of cells, red blood cells, white blood cells and platelets keep floating in it. We can now define blood as follows : Blood is a liquid (or fluid matrix) called plasma with red cells, white cells and platelets floating in it. If you know more details please click on the links describe all the three components of blood in a more detail.