Give differences: $T$-lymphocytes and $B$-lymphocytes
$T$-lymphocytes | $B$-lymphocytes |
$(1)$ They form cell mediated immune system. | $(1)$ They form humoral or antibody-mediated immune system. |
$(2)$ They fight against pathogens including protists and fungi that enter cell. | $(2)$ They fight against viruses and bacteria that enter blood and lymph. |
$(3)$ They form killer, helper and suppressor cells by the division of lymphocytes. | $(3)$ They form plasma cells and memory cells by the division. |
The immunity obtained after the body has recovered from a disease is
Definitions / Explanation : Active immunity & Passive immunity
provides passive immunity
In higher vertebrates, the immune system can distinguish selfcells and non-self. If this property is lost due to genetic abnormality and it attacks selfcells, then it leads to
$R.B.C.$ in adult are formed