What are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders, where a disease of the eye in response to changes in the vitreous humor or more rarely, diabetes, that causes the cells response?
White blood cell White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All white blood cells are produced and derived from multipotent cells in the bone marrow known as hematopoietic stem cells. Leukocytes are found throughout the body, including the blood and lymphatic system.
Thymic involution One of the major characteristics of vertebrate immunology is thymic involution, the shrinking of the thymus with age, resulting in changes in the architecture of the thymus and a decrease in tissue mass. This process is a conserved sequence or (orthologous sequences) in almost all vertebrates, from birds, teleosts, amphibians to reptiles, though the thymi of a few species of sharks are known not to involute. T-cells are named for the thymus where T-lymphocytes migrate from the bone marrow to mature. Its regression has been linked to the reduction in immunosurveillance in the elderly. Though thymic involution has been linked to senescence, it is not induced by senescence as the organ starts involuting from a young age – as early as the first year of life in humans.