The parasympathetic nervous system (PSNS) and the sympathetic nervous system (SNS)
Chiggers don’t bite, instead they use there mouths to drill holes through skin; during this process they spit to break down skin cells which is most likely the reason why it itches.
Answer:
Imperialism is a policy or ideology of extending a nation's rule over foreign nations, often by military force or by gaining political and economic control of other areas
There are numerous circumstances that give pathogens the chance to harm people.
The first occurs when an infection has already weakened the immune system. In situations like this, other pathogens may infect the host opportunistically and cause an infection. If the human host does not maintain proper personal and environmental hygiene, that is another condition. Many pathogens thrive in unclean environments, so by failing to maintain proper environmental hygiene, a person increases his risk of contracting a pathogen.
Finally, since so many pathogens are transferred by vectors, humans are more likely to contract the diseases that these vectors aid in spreading if they do not take the necessary precautions to stop their activity.
To learn more click on the following link
brainly.com/question/13062523
#SPJ4
