Why is innate immunity called non-specific? Name and explain its four types of barriers.

Name and explain the different types of the system.

Name four basic types of tastes.

Name the four main types of tissues.

Name two types of immune systems.

Name four types of psychotropic drugs.

List the four types of barries of innate immunity.

To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?