What do you know about blood?

What do you know about blood?

Blood is the liquid tissue circulating in the circulatory system, made up of the visible component of plasma and cells (red blood cells, white blood cells, platelets).

Blood is the life-sustaining fluid that is transmitted throughout the organs through:

  • Heart;
  • Artery;
  • Vein;
  • Capillaries.

The function of blood

Blood transports nutrients to nourish the body such as:

Blood also helps to remove the following substances from the body:

  • Waste;
  • Carbon dioxide.

Composition of blood

The components that make up blood in the human body include plasma. In it, plasma contains blood cells, including:

  • Red blood cells (red blood cells) carry oxygen from the lungs to the rest of the body;
  • White blood cells (white blood cells) help fight infections and support the immune process. There are the following types of white blood cells: Lymphocytes, monocytes, eosinophils, basophils, neutrophil (granulocytes);
  • Platelets control bleeding.

Chemical composition in blood

Where do blood cells come from?

Blood cells are made in the bone marrow. Bone marrow is a soft, spongy substance concentrated in the center of the skeleton that makes up about 95% of the body’s blood cells. Most of the bone marrow in adults is concentrated in the pelvis, chest bone and spine.

Many other organs in our body play a role in regulating blood cell formation. Lymph nodes, spleen, and liver help regulate the production, destruction, and differentiation (development of a specific function) of cells. The process of making and developing new blood cells is called hematopoiesis.

The blood cells that form in the bone marrow are known as stem cells. A “stem cell” (or hematopoietic cell) is the first stage of all blood cells. As stem cells mature, other cells begin to evolve, such as red blood cells, white blood cells, and platelets. Immature blood cells are also called immature blood cells. Some of the immature blood cells are retained in the marrow to continue the maturing process, others migrate to other parts of the body, where they continue to develop fully.

The function of blood cells

Red blood cells

The main function of red blood cells is to transport oxygen and carbon dioxide. Hemoglobin (Hgb) is an important protein in red blood cells that transports oxygen from the lungs to all parts of the body.

White blood cells

The main function of white blood cells is to fight infection. There are different types of white blood cells that have different functions in the prevention of bacterial, viral, fungal and parasitic infections. The most important types of white blood cells help protect the body from infection and foreign cells such as:

  • Neutrophils;
  • Eosinophils;
  • Lymphocytes;
  • Monocytes.

White blood cells help heal wounds not only by preventing infection, but also by consuming material forms, such as dead cells, thin tissue, and old red blood cells.

White blood cells help protect the body from outside bacteria like allergens. In addition, it also plays a certain role in protecting the body from mutated cells such as cancer-causing cells.


The main function of platelets is to coagulate. Platelets are much smaller than other blood cells. Platelets group together to form platelet nodes, leading to stop bleeding.

What is Total Blood Cell (CBC)?

Total blood cells (CBC) is a measure of the size, number and maturity of different blood cells in a given amount of blood. A certain amount of blood cells can be used to identify abnormalities in the formation or destruction of blood cells. Based on the total blood cell (CBC) calculation to determine the infection status. Usually when you have an infection, the white blood cell count increases. The proliferation of immature white blood cells may be associated with leukemia. People with anemia or sickle cell disease will have abnormally low levels of hemoglobin.

The articles of Hello Health Group and Health CPN are for reference only, and are not a substitute for medical diagnosis or treatment.

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