Killing a human being is typically viewed as murder however, this being an unborn child raises several questions. Here's the problem: when you harvest stem cells from an embryo, you destroy it. While everybody has stem cells, the cells used for research primarily come from human embryos. The monoblast points to a picture of a cell labeled monocyte. The fourth arrow from the myeloid stem cell points to a picture of a cell labeled monoblast. One cell is labeled basophil, one is labeled neutrophil, and the third cell is labeled eosinophil. The myeloblast points to pictures of 3 different cells. The third arrow from the myeloid stem cell points to a picture of a cell labeled myeloblast. The proerythroblast points to a picture of a cell labeled reticulocyte, and the reticulocyte points to a picture of a red blood cell labeled erythrocyte. The second arrow from the myeloid stem cell points to a picture of a cell labeled proerythroblast. This cell points to a picture of a cell labeled megakaryocyte, and the megakaryocyte points to a picture of fragments labeled platelets. The first arrow from the myeloid stem cell points to a picture of a cell labeled megakaryoblast. The myeloid stem points to pictures of 4 different cells. On the left side of the diagram there is an arrow pointing to a picture of a cell labeled myeloid stem cell. One arrow points to a picture of a cell labeled T lymphocyte and the other arrow points to a picture of a cell labeled B lymphocyte. There are 2 arrows from the small lymphocyte. The other arrow from the lymphoblast points to a picture of a cell labeled small lymphocyte. The lymphoblast has 2 arrows, one pointing to a picture of a cell labeled natural killer cell, large granular lymphocyte. From that cell, there is an arrow pointing to a picture of a cell labeled lymphoblast. On the right side of the flow chart, there is an arrow pointing from the hematopoietic stem cell to a picture of a cell labeled lymphoid stem cell. From that cell, there is a line that branches to the left and right on the diagram. At the top of the chart is a hematopoietic stem cell. A flow chart showing the origin of different types of blood cells.
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