File:Erythrocyte and lymphocyte SEM01.jpg

Erythrocyte, Thrombocyte and T Lymphocyte

• Left - red blood cell (erythrocyte, 7 µm in diameter) about 5 x 10⁹/ml of blood (5 thousand million cells in every millilitre of blood)
• Centre - platelet (thrombocyte, a fragment of a blood cell the megakaryocyte)
• Right - white blood cell (lymphocyte, a T-lymphocyte involved in immunity)

Blood Images: Erythrocyte, thrombocyte and lymphocyte unlabeled | Erythrocyte, thrombocyte and lymphocyte colour and labels | Erythrocyte, thrombocyte and lymphocyte labels

Human Blood Cells/ml

• Erythrocyte - about 5 x 10⁹/ml of blood (5 thousand million cells in every millilitre of blood)
  • Male: 4.32 - 5.66 x 10⁹/ml
  • Female: 3.88 - 4.99 x 10⁹/ml
• Thrombocyte - 140 - 440 x 10⁶/ml (100 to 400 million in every millilitre of blood)
  • not a cell, a cell fragment.
• T-lymphocyte - 0.77 - 2.68 x 10⁶/ml (1 to 2.5 million in every millilitre of blood)
  • CD4+: 0.53 - 1.76 x 10⁶/ml
  • CD8+: 0.30 - 1.03 x 10⁶/ml
  • NK cells: 0.20 - 0.40 x 10⁶/ml

Lymphocyte EM Images: T and B Lymphocytes 1 TEM | T and B Lymphocytes 2 TEM | T Lymphocyte SEM | B lymphocyte 1 TEM | B lymphocyte 2 TEM | B lymphocyte 3 TEM | Plasma Cell TEM | T2 Lymphocyte 1 TEM | T2 Lymphocyte 2 TEM | lymphocyte rosettes | T lymphocyte 1 | T lymphocyte 2 | T lymphocyte 3 | T lymphocyte 4 | T lymphocyte 5 | T lymphocyte 6 | B lymphocyte | B lymphocytes TEM | Immune System Development | Blood

Image: Hitachi S-570 scanning electron microscope (SEM) equipped with a GW Backscatter Detector. Electron Microscopy Facility at The National Cancer Institute at Frederick (NCI-Frederick) http://web.ncifcrf.gov/

Original image has been scaled and contrast adjusted.