Caption: Human T lymphocyte (pre-T cell). Lymphocytes are involved in the specific immune response and are composed mainly of precursor T cells and B cells (pre-T cells and B cells).Pre-T cells and B cells are subsets of lymphocytes that originate in the red bone marrow from hematopoietic stem cells. Pre-T cells (also known as T lymphocytes) circulate in the blood before migrating to the thymus where they develop into specialized cells (helper T cells and killer T cells) that are able to identify antigens and infected tissue cells.
Magnification*: x1,475
Type: SEM
Copyright 1998 Dennis Kunkel Microscopy, Inc.
Keywords: 96501F,06.01.04,Blood,helper T cell,human,killer T cell,leukocyte,pre-T cell,T-lymphocyte,T cell,T lymphocyte,white blood cell,SEM