Changes

'''Red blood cells''' are a major component in [[blood]] that transport [[oxygen]] and [[nutrient]]s to other areas of the body.

'''Red blood cells''' are a major component in [[blood]] that transport [[oxygen]] and [[nutrient]]s to other areas of the body. Red blood cells, like all [[blood cells]], are produced in the [[bone]] marrow. They contain the substance [[hemoglobin]], a complex [[organic molecule]] that includes [[iron]], and allows them to readily bond to oxygen in the bloodstream. They lack a nucleus and thus contain no genetic material of their own. The lifespan of a red blood cell is about 120 days.

==See Also==

==See Also==