The Japanese word for Japan is æ¥æ¬, which is pronounced Nippon or Nihon and literally means the origin of the sun. The earliest record of the name Nihon appears in the Chinese historical records of the Tang dynasty, the Old Book of Tang.
Primary versus Secondary Immune Response The primary immune response occurs the first time that the immune system comes in contact with the antigen.
Difference Between Lymphocytes and Leukocytes. Lymphocytes are a type of white blood cells in the immune system. It has three major types, namely: Natural Killer (NK) cells, T-cells (Thymus cells) and B-cells (Bone cells). NK cells are a type of cytotoxic (cell toxic) lymphocyte that represent a major component of the inherent immune system.