Question

1. step 2: the defense team in action the first body system that encounters this pathogen is the ______ system. this system tries to stop the pathogen by ____. if the pathogen gets past this first defense, the ____ system gets involved. another body system that joins the fight is the ____ system, which helps by ______

Explanation:

1. The first body system to encounter a pathogen is the integumentary (skin, mucous membranes) system. It stops pathogens via physical/chemical barriers (e.g., skin, stomach acid, mucus).
2. If pathogens breach this, the immune (lymphatic) system activates, using white blood cells, antibodies, and inflammation.
3. The circulatory system also helps by transporting immune cells and antibodies to infection sites. (Other systems like respiratory/digestive may apply, but circulatory is key for transport.)

Answer:

1. The first body system that encounters this pathogen is the \underline{Integumentary (or Immune, if considering initial exposure routes like respiratory; most commonly Integumentary)} system.
2. This system tries to stop the pathogen by \underline{providing physical/chemical barriers (e.g., skin, mucus, stomach acid)}.
3. If the pathogen gets past this first defense, the \underline{Immune (Lymphatic)} system gets involved.
4. Another body system that joins the fight is the \underline{Circulatory} system, which helps by \underline{transporting immune cells/antibodies to infection sites}.

(Note: Answers may vary slightly based on context, but the above follows standard human body defense mechanisms.)