A blood test is an examination of a blood sample to help diagnose an illness and to check what are other harmful substances present in the bloodstream and to check if how well the body of the patient is reacting on a treatment. Blood tests help the doctor to assess the condition of the body organs like kidneys, liver or heart and how are these organs are working. This is also a way to diagnose serious illnesses such as HIV/AIDS, diabetes, cancer and heart disease. This is also a way to check if the medicines being given to the patient are working and also to check how well the patient's blood is clotting.

This type of test is very common, most of the blood tests do not require any preparation but some may need for you to fast. That means you are not allowed to ingest any food or drinks usually 8 to 12 hours before the blood extraction. This procedure is very quick and easy and the patient may feel a little discomfort on the extraction process but it is just a short term feeling. After the blood is drawn, it will be analyzed in the laboratory either the whole blood or separate the blood cells from the plasma. 

Common Blood tests:

  • Complete Blood Count or CBC
  • Blood Chemistry
  • Blood enzyme test

What is CBC?

This is one of the most common blood tests and this is usually done as part of a routine check-up. This test can help detect infections, immune system disorders, anemia and many more and it measures different parts of the blood.

Parts of Blood

Red Blood Cells: This is the part of the blood that carries oxygen coming from your lungs to all the parts of the body. Through the red blood cells, they will check if you have anemia, dehydration or bleeding inside your body.

White Blood Cells: This is part of the body's immune system, they are the ones who are responsible for fighting infections and disease. low level of white blood cell is an indication that a person has an infection or immune system disorder.

Platelets: This is the part of the blood that is responsible for blood clotting. They stick together so they block cuts on the walls of the blood vessel and to stop the bleeding. unusual platelet level in the body may be a sign of both, bleeding or thrombotic disorder.

Hemoglobin: This is the iron in the red blood cells that carries oxygen. Abnormal hemoglobin may indicate that you are anemic or has other blood disorders.

Hematocrit: This is the measurement of the space the red blood cells take up in the blood. High hematocrit means dehydration and low hematocrit means your anemic.

Mean Corpuscular Volume: Measurement of the average size of the RBC.

These are some of the examples of blood tests and how they are being performed and their importance in the body. Now, we have understood that this is also a way to detect symptoms that might lead to serious illnesses.