Components of blood and cell lines

• Blood cell lineage:

  A) Haematopoeitic stem cell

  B) Common myeloid progenitor

  C) Common lymphoid progenitor

  D) Myeloblast

  E) Lymphoblast

  F) Erythrocytes

  G) Platelets

  H) Basophil

  I) Neutrophil

  J) Eosinophil

  K) Monocyte

  L) T lymphocyte

  M) B lymphocyte

  
• Haematopoiesis describes the production of cells that circulate in the bloodstream. Specifically, erythropoiesis is the process by which red blood cells (erythrocytes) are produced. It occurs within the hematopoietic system, which includes organs and tissues such as the bone marrow, liver, and spleen.
• Red blood cells (erythrocytes): These transport oxygen and haemoglobin throughout the body.
• White blood cells (leukocytes): These support the immune system. There are several different types of white blood cells:

  ·       Lymphocytes: Including T cells and B cells, which help fight some viruses and tumors.

  ·       Neutrophils: These help fight bacterial and fungal infections.

  ·       Eosinophils: These play a role in the inflammatory response, and help fight some parasites.

  ·       Basophils: These release the histamines necessary for the inflammatory response.

  ·       Macrophages: These engulf and digest debris, including bacteria.
• White blood cells have the shortest life span, sometimes surviving just a few hours to a few days, while red blood cells can last up to 120 days or so.