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Sigma KEE - BloodCell
KB Term: 

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BloodCell
A Cell that is normally present in Blood.
Relationships      
Parents AnimalAnatomicalStructure AnatomicalStructures that are possessed exclusively by Animals.
  Cell The fundamental structural and functional unit of living Organisms.
Children PlateletPlatelets, also called thrombocytes, are a component of blood whose function (along with the coagulation factors) is to react to bleeding from blood vessel injury by clumping, thereby initiating a blood clot. Platelets have no cell nucleus; they are fragments of cytoplasm that are derived from the megakaryocytes of the bone marrow, which then enter the circulation. Circulating inactivated platelets are biconvex discoid (lens-shaped) structures,  2–3 µm in greatest diameter. Activated platelets have cell membrane projections covering their surface. Platelets are found only in Mammals, whereas in other vertebrates (e.g. Birds, amphibians), thrombocytes circulate as intact mononuclear cells.
 RedBloodCellBloodCells that contain hemoglobin, lack a CellNucleus, and carry Oxygen to the tissues of the body.
 WhiteBloodCellBloodCells that lack hemoglobin, contain a CellNucleus, and have no color.


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