Answer:
A.
first line of defense
Explanation:
The first line of defense acts to prevent external substances from entering the body hence sneezing out the pollen acts to expel the pollen from entering his windpipe thus is the first line of defense.
Answer: Molecules present
ExplanationBlood types are determined by the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body
How much you respect and like yourself
AIDS is treatable but not curable and Chlamydia is curable
A-2
B-1
Skeletal muscle voluntary muscle that is attached to bones of the skeleton and helps the body move. Smooth muscle involuntary muscle that is found in the walls of internal organs, such as the stomach . Voluntary muscle that is under your conscious control.
