What is true about $T-lymphocytes$ is mammals?
They scavenge damaged cells and cellular debris
These are produced in thyroid
There are three main types-cytotoxic $T-cells$, helper T-cells and suppressor T-cells
These originate in lymphoid tissues
In mammals, histamine is secreted by
Grave's disease is caused by the hypersecretion of thyroid hormone and is associated with the
Infection of pneumonia occurs due to