Answer:
I think this is how it goes
1. Nose/mouth
2. Pharynx
3. Larynx
3.Trachea
4.Bronchi
5.Alveoli
6.Heart
7.Blood Vessels
Explanation: it starts out from the nose then continues down to through the lung system then the heart to the blood stream
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 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.
Answer:
the answer to this question is d
