Question

Describe the composition of blood.

Answer 1

Blood contains a straw coloured fluid called plasma, containing many cells like:

• Red blood cells – These are flat, disc shaped cells with depression in centre. They contain haemoglobin, the red pigment, which forms oxyhaemoglobin with oxygen and helps in transporting oxygen to all parts of body.
• White blood cells – These cells are larger and do not have haemoglobin. They actively move to destroy disease causing organisms and protect the body.
• Blood platelets – These cells are small, colourless, irregularly shaped and help in stopping the blood flow after an injury.