File:Hematopoietic and stromal cell differentiation.jpg

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Hematopoietic and Stromal Cell Differentiation

Cartoon showing the origin of different connective tissue cells from a common stem cell population lying within the bone marrow.


Links: Stem Cells | Blood Development | Bone Development
  • haematocrit - The percentage by volume of red blood cells in whole blood.
  • haemopoiesis - The term used to describe the process of blood cell formation/differentiation from blood stem cells. In the embryo, this is mainly red blood cell formation which begins in the yolk sac mesoderm, then the liver and other organs finally residing in the bone marrow.


Bone Marrow Histology: Blood Development | Marrow overview | Megakaryocyte | Megakaryocyte detail | Myelocyte | Normoblast | Reticulocyte | Blood Histology | Bone Development | Category:Blood


Blood Histology: Blood Development | Blood Cell Number Table | Lymphocyte 1 | Lymphocyte 2 | Lymphocyte 3 | Lymphocyte 4 | Monocyte 1 | Monocyte 2 | Monocyte 3 | Monocyte 4 | Neutrophils 1 | Neutrophil 2 | Neutrophil 3 | Neutrophil 4 | Eosinophil 1 | Eosinophil 2 | labeled Neutrophil and Eosinophil | unlabeled - Neutrophil and Eosinophil | Basophil 1 | Basophil 2 | Basophil 3 | Platelet 1 | Platelet 2 | Reticulocyte | Megakaryocyte | Movie | Bone Marrow Histology | Category:Blood
Blood Cells  
Adult human blood cell numbers shown in the table below is for reference purposes.

Blood Cell Numbers

The adult ranges of cells / 1 litre (l), total blood volume is about 4.7 to 5 litres. Blood Development | Blood Histology

Red Blood Cells

  • Male: 4.32 - 5.66 x 1012/l
  • Female: 3.88 - 4.99 x 1012/l

Leukocytes (white blood cells)

  • Male: 3.7 - 9.5 x 109/l
  • Female: 3.9 - 11.1 x 109/l

Granulocytes

  • 1.8 - 8.9 x 109/l
    • Neutrophils: 1.5 - 7.4 x 109/l
    • Eosinophils: 0.02 - 0.67 x 109/l
    • Basophils: 0 - 0.13 x 109/l

Non-Granulocytes

  • Monocytes 0.21 - 0.92 x 109/l

Lymphocytes

  • 1.1 - 3.5 x 109/l
    • B-cells: 0.06 - 0.66 x 109/l
    • T-cells: 0.77 - 2.68 x 109/l
      • CD4+: 0.53 - 1.76 x 109/l
      • CD8+: 0.30 - 1.03 x 109/l
    • NK cells: 0.20 - 0.40 x 109/l

Platelets

  • 140 - 440 x 109/l
    • not a cell, a cell fragment.

Image source: NIH Stem Cells Information

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