Which is not a part of the immune system? a. skin b. stomach acid c. mucus d. fingernails

Immune system is a network composed of cells, tissues, and organs that work together so that the body may be protected from harm. Skin, stomach acid, and mucus all perform to protect the body. The fingernails, being outgrowth of skin, do not perform that much. Thus, the answer is letter D. 

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.

Ithink sanforcisco california (i am not 100% sure) if you feel the opposite so that lol