One of the most important parts of our body is the fluid that flows in it to provide necessary nutrients and oxygen to all parts of the body i.e. blood. It is made up of blood cells that contain blood plasma. Other important components of blood are glucose, hormones, mineral oils, dissipated proteins, carbon dioxide, etc. The branch of medicine that studies the diseases and disorders related to blood is called hematology. It aims to provide readers with a thorough understanding of this vast subject. The topics included herein are of utmost significance and bound to provide incredible insights to readers. It will serve as a valuable source of reference for graduate and post-graduate students.