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 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.

Image and text copyright © Dennis Kunkel. All rights reserved.

ORDER INFORMATION
View Order

Image Galleries: Gallery of the Hubble Space Telescope | David Malin's Astronomical Journey | Dennis Kunkel's Microscopic World | Astronomy Gallery | Earthshine/Moonshine by Matt BenDaniel | Robert Gendler's Window on the Universe | Earth from Space | Light Years by Russell Croman | Ted Kinsman's World of Science | A Cosmic Perspective by Akira Fuji | As Viewed from Earth by David Miller