Question

The human immune system consist of

• A. Lymphoid organs and soluble molecules
• B. Lymphoid cells and antibodies
• C. All of the above
• D. Lymphoid tissues

Answer 1

The correct option is C All of the above

Immune system :
Immune system is a network of cells, tissues, organs, and the substances that protects the body from foreign invaders.

Part of immune system :
Immune system consists of lymphoid organs, tissues, cells and soluble molecules like antibodies.
$1$. Lymphoid organs are bone marrow and thymus.
$2$. Lymphoid tissues include MALT, GALT etc.
$3$. Lymphoid cells include B-lymphocytes and T-lymphocytes