<unk> s are immature red blood cells, typically composing about 1% of the red cells in the human body. <unk> s develop and mature in the red bone marrow and then circulate for about a day in the blood stream before developing into mature red blood cells. Like mature red blood cells,<unk> s do not have a cell nucleus.
They are called<unk> s because of a<unk> ular (mesh-like) network of ribosomal RNA that becomes visible under a microscope with certain stains such as new methylene blue.
Reticulocyte
Granulocyte
Megakaryocyte
Monocyte
Oocyte
Lymphocyte
Platelet
Proerythroblast