White Cells, Red Cells, & Platelets

The Types and Development of Blood Cells

Normally, the body makes blood stem cells (immature cells) that develop into mature blood cells over time. A blood stem cell may become a myeloid stem cell or a lymphoid stem cell.  → More…

Blood cell development. A blood stem cell goes through several steps to become a red blood cell, platelet, or white blood cell.


Normal types of blood cells. Erythrocytes are the red blood cells. Also shown are platelets (thrombocytes). All the other cells shown are types of white blood cells (leukocytes). Granulocytes (granular leukocytes) are basophils, neutrophils, and eosinophils. Agranulocytes (agranular leukocytes) are monocytes and lymphocytes.

Indepth Tutorial: Part IPart II

CBC – Complete Blood Count

Among the many results of the  CBC  are counts of white cells, red cells, and platelets. What do they mean?


Reference range for blood tests.   More…

The following are links to excellent explanations of blood cells and blood counts.

Complete Blood Count: Lymphocytes 

Complete Blood Counts: Red Blood Cells 

When Platelet Counts Start Dropping 

Understanding Your Complete Blood Count [general] new

Understanding the Complete Blood Count With Differential [clinical]

And here’s a peek at what CLL cells look like (from CLL Topics Updates  ):

Mug-Shot of CLL cells

CLL Cells[This] is a picture of what CLL cells look like when they are viewed under a microscope. CLL cells are small, round B-cells (stained dark purple in this slide). Often, there are “smudge cells”; think of them as cells that have gotten squished flat.
→ More…

Red_White_Blood_cells (1)

From left to right: erythrocyte, thrombocyte, leukocyte


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