Question

Study of blood is called?

Answer 1

Blood studies in health and disease are hematological. It includes problems with the red blood cells and white blood cells, platelets, blood vessels, bone marrow, lymph nodes, spleen and all the proteins involved in bleeding and clotting factors. Hemostasis and thrombosis. Red blood cells' life span is said to be $120$ days while white blood cells have a shorter life span about $45$ days.

Complete answer:
Hematology as we discussed as the study of blood and blood producing organs and cells. Blood as we know are carried in vessels known as blood vessels. Blood vessels which carry deoxygenated blood from other parts of the body to heart are called veins. Veins carry carbon dioxide in the blood except for a pulmonary vein that carries oxygenated blood from lungs to heart. Artery carries oxygen rich blood into heart and lungs and other body parts while veins carry deoxygenated blood from other parts of the body.
Hematology also shows the prevention of blood occurring diseases. Such diseases might include hemophilia, blood clots, other bleeding disorders and blood cancers such as leukemia, myeloma, lymphoma. Blood cells are being manufactured or synthesized in the bone marrow. As mainly blood consists of red blood cells more than white blood cells. It also contains a pigment red color which comes from an ionic gradient present in blood called Hemoglobin. Hemoglobin is a water soluble or hydrophilic compound which is present on the surface of a red blood cell.
White blood cells on the other hand are the colorless liquid which is also present in blood. Its main function is to carry out the defense mechanism of our body. It provides immunity to the body as it contains- neutrophils, basophils, monocytes. It acts as a protective barrier against the invaders which tries to enter into our system. These cells are large in number found in the white blood cells.
Platelets are the third component in our blood which comprises also of colorless transparent liquid. It has more water than other components of blood and plasma are another component found in platelets. Platelets consist of clotting factors or clotting proteins. These proteins are nothing but enzymes which helps to bind our blood as soon as a cut or injury is being detected in the body. Without clotting proteins it’s hard to slow down or stop the blood flow from the injured site.

Note:
As we discussed about the major components and location where blood is being synthesized. There are also some facts in blood as- blood constitutes ninety percent of water and ten percent of these components. Water helps blood in maintaining its fluidity nature otherwise blood can clot in the body due to a high amount of different clotting factors. So, it is essential for water balance in the body in order to keep the blood flow balanced.