A lymphocyte is a type of white blood cell in the vertebrate immune system.There are two broad categories of lymphocytes, namely the large granular lymphocytes and the small lymphocytes depending on their appearance under microscope.
Most, but not all large granular lymphocytes are more commonly known as the natural killer cells (NK cells). The small lymphocytes are the T cells and B cells. Lymphocytes play an important and integral role in the body’s defenses
NK cells are a part of innate immune system and play a major role in defending the host from both tumors and virally infected cells. NK cells distinguish infected cells and tumours from normal and uninfected cells by recognizing alterations in levels of a surface molecule called MHC (major histocompatibility complex) class I. [Read more...]
A trauma center is a hospital equipped to provide comprehensive emergency medical services to patients suffering traumatic injuries. Trauma centers were established as the medical establishment realized that traumatic injuries often require complex and multi-disciplinary treatment, including surgery in order to give the victim the best possible chance for survival and recovery.
There are two broad categories of immunity involved in host defense – natural or innate and acquired. While natural immunity is more generalized, acquired immunity is more specific and adaptive. There are various levels of host defense that protect human body from invading attacks.
