The thymus is a lobed organ located near the $...A...$ and beneath the $...B... $ The most appropriate combination for $\mathrm{A}$ and $\mathrm{B}$ is
$A-heart; B-breast bone$
$A-liver; B-ribs$
$A-heart; B-ribs$
$A-intestine; B-ribs$
Spleen is
$MALT$ constitutes about _______ percent of the lymphoid tissue in human body.
What are interferons ? How do interferons check infection of new cells ?
Lymphocytes are seen in large numbers at sites of inflammation because
Select the correct pair
Column $- I$ | Column $- II$ |
$(A)$ Physiological barrier | $(1)$ Skin |
$(B)$ Cellular barrier | $(2)$ Macrophages |
$(C)$ Physical barriers | $(3)$ interferons |
$(D)$ Cytokine barriers | $(4)$ Tears |
$(5)$ Mucus |