Larry is taking a walk in the park. The pollen in the air makes him sneeze constantly. The line of defense that is his immune system exhibiting is that of "(A) first line of defense." There are only 3 lines of defense in the immune system. The first line of defense <span>are a combination of physical and chemical barriers that prevent all types of foreign agents from penetrating the outer layer of the body. In this case, it is the nasal cavity</span>
The axial region of the body is the portion that is directly attached to the spine! Good luck!
OCD affects approximately 2.3% of the population
Sex-linked Trait.
Hope that was helpful
