This course deals with The Two important systems in the human body; the blood and lymphoid systems. Nevertheless both are also related functionally and structurally.

The Blood is traditionally the elixir of life responsible for hemostasis, nutrition, carrying oxygen, nutrients and wastes. Protection or defense is a crucial function that is partially achieved by defense cells and molecules carried by blood and contained in the immune system. On the other hand, in disease conditions, for example neoplasia of either system overlaps or compromises the other.