If foreign substances pass the body's first line of defense and into the bloodstream, what happens? they are attacked by saliva or mucous. they are attacked by lymphocytes. the body has no other defense.

The answer is that ~They Are Attacked By Lymphocytes~

it's false.

"every person has their limitations which prevent us from accomplishing something. some are better than mathematics for example and some are worse. those people who are worse might never be able to become mathematicians, but that does not mean that they would not be great at doing something else."