The species theory, polygenism, held that human races were of different lineages and suggested a hierarchy outlined in the Chain of Being that positioned Africans between man and lower primates.
No, they are involved in the Circulatory System which is responsible for pumping and channelling blood to and from the body and lungs with heart, blood and blood vessels. no veins are not considered an organ because they are a grouping of different tissues like a organ.
Rating Newest Oldest. Best Answer: The red blood cell isn't part of any organ, though it is part of blood (which is a tissue). It is, however, associated with the lungs (gas exchange), heart (pumping action), kidneys (to get rid of urea and other wastes), bone marrow (creation) etc.he red blood cell, together with the white cells and trombocites are part of blood. It goes all through the circulatory system, whose main organ is the heart.