The answer is lower blood pressure that is the answer
Exchange systems help primarily with:
a. balance.
Answer:
her colds were gone after an hour of taking the medication... because the medicine cleared the nosal cavity...
Answer:
Some vaccines contain whole bacteria or viruses. In these cases the bacteria or viruses will either be severely weakened (attenuated) so that they cannot cause disease in healthy people, or killed altogether (inactivated). Many vaccines contain only parts of viruses or bacteria, usually proteins or sugars from the surface. These stimulate the immune system but cannot cause disease
Explanation: