Question

Given is a diagram of a human blood smear. Study the diagram and answer the question that follows. Name the components numbered 1 to 4.

Answer 1

Hint: A blood smear is a blood test used to look for abnormalities in blood cells. blood cells that the test focuses mainly on the components of the blood. The difference in the number of blood components helps to detect the abnormalities of the blood.

Complete answer:
1. RBC
2. Neutrophil
3. Blood platelets
4. Blood plasma

Additional Information:
-The component numbered 1 i.e. Red Blood Corpuscles (RBCs) are enucleated and do not contain mitochondria or ribosomes and nuclei.
The main function of RBCs is the transport of oxygen ($O_2$) from the cells of the body and delivering carbon dioxide ($CO_2$) to the lungs. The RBCs are biconcave in shape due to denucleation that helps them in passing through tiny blood vessels as they carry oxygen to various organs and tissues of the body. This shape of RBC will have its surface area and volume ratio. This feature of the RBCs enables easy diffusion of $O_2$ and $CO_2$ across the RBC's plasma membrane.
-In the diagram part ’2’ is a neutrophil.
Neutrophils help to fight infection by ingesting microorganisms and releasing enzymes that have the capacity to kill the microorganisms. A neutrophil is a type of white blood cell, which is a granulocyte, and a type of phagocyte.
-In the image, part ’3’ is blood platelets. Platelets (thrombocytes) help blood clotting and are colorless blood cells. Platelets help to stop bleeding by clumping and forming plugs in blood vessel injuries.
-In the given diagram of a human blood smear, part '4' represents the Plasma.
Fibrinogen is the soluble protein found in Plasma that forms insoluble threads during the clotting of blood.
At the site of injury, the damaged tissue or cells release thromboplastin which in the presence of calcium ions converts inactive prothrombin into thrombin. Thrombin then converts the soluble fibrinogen into insoluble fibrin threads which trap the blood cells and forms a blood clot.

Note:
A blood smear is a blood test that helps to identify abnormalities in blood cells. The three main blood cells on which we are focusing are:
-Red cells, which carry oxygen throughout your body
-White cells, which help your body fight infections and other inflammatory diseases
-Platelets, which are important for blood clotting
The test provides information on the number and shape of these cells, which can help doctors diagnose certain blood disorders or other medical conditions.