Cell-Mediated Immunity (CMI)
The branch of the in which the reaction to foreign
material is performed by specific
defence cells ( ,
) rather than antibodies.
Any immune reaction that can be transferred with immune serum is termed humoral immunity
(as opposed to cell-mediated immunity). In general, this term refers to resistance that
results from the presence of specific antibodies ( ).
These antibodies circulate through the blood and lymph system.
When blood is spun in centrifuge, the red blood cells fall to the bottom of the tube,
leaving behind a straw-colored liquid called the serum . Antibodies are located in the blood serum and
thus can be transferred
with an immune serum.