The CMY colours (commonly mistaken for Blue, Red and Yellow) are the answer when printing as mixing any two will form one of the darker RGB colours. The mix of all three CMY colours creates Black, although in practice this is very muddy.
White blood cells, like all blood cells are created in the bone marrow from certain stem cells. However, some lymphocytes are created but undeveloped or immature.
Organs of the Immune System: significance of the lymphatic and circulatory systems. Many organs are involved in the immune response like the lymphatic system, bone marrow, the spleen, and the thymus.Bone marrow, the spongy tissue inside of the bone, is the birthing ground for white blood cells. cells mature in the bone marrow, but T cells travel to the thymus to grow. Just like blood travels through veins and arteries, the cells of the immune system have their own transportation system where they perform many functions. This is called the lymphatic system.