FROM WIKIPEDIA
2017 ,sep 21
Involution refers to the shrinking or return of an organ to a former size. At a cellular level, involution is characterized by the process of proteolysis of the basement membrane (basal lamina), leading to epithelial regression and apoptosis, with accompanying stromalfibrosis. The consequent reduction in cell number and reorganization of stromal tissue leads to the reduction in the size of the organ.
Thymus[edit]The thymus continues to grow between birth and puberty and then begins to atrophy, a process directed by the high levels of circulating sex hormones. Proportional to thymic size, thymic activity (T cell output) is most active before puberty. Upon atrophy, the size and activity are dramatically reduced, and the organ is primarily replaced with fat. The atrophy is due to the increased circulating level of sex hormones, and chemical or physical castration of an adult results in the thymus increasing in size and activity. [1]
The Thymus as related to the Stone Age as the age when humans were growing into Puberty as related to the Thymus and it's ability to be stretched outwards as the show of strength. Basic use in the stone age when Cro Magnum man was in conflict with Neanderthal man.
2017 ,sep 21
Involution refers to the shrinking or return of an organ to a former size. At a cellular level, involution is characterized by the process of proteolysis of the basement membrane (basal lamina), leading to epithelial regression and apoptosis, with accompanying stromalfibrosis. The consequent reduction in cell number and reorganization of stromal tissue leads to the reduction in the size of the organ.
Thymus[edit]The thymus continues to grow between birth and puberty and then begins to atrophy, a process directed by the high levels of circulating sex hormones. Proportional to thymic size, thymic activity (T cell output) is most active before puberty. Upon atrophy, the size and activity are dramatically reduced, and the organ is primarily replaced with fat. The atrophy is due to the increased circulating level of sex hormones, and chemical or physical castration of an adult results in the thymus increasing in size and activity. [1]
The Thymus as related to the Stone Age as the age when humans were growing into Puberty as related to the Thymus and it's ability to be stretched outwards as the show of strength. Basic use in the stone age when Cro Magnum man was in conflict with Neanderthal man.