I think the skin is the largest organ in the human body :)
I hope this helps!
Answer:
The answer is Physical. Physical immunity occurs when a person immune system responds to antigen.
Explanation:
ANSWER: compared to PH3 a PH1 would be more acidic than a PH3
Explanation: so on the PH scale 1 is acid 7 is neutral and 14 is alkaline. PH1 would be stomach acid, a PH3 would be vinegar.
The answer is: Signal transduction pathways.