Sound is a type of mechanical signal in our environments. We use our sense of hearings to receive this signal type. How can signals from our environment affect out circulatory system?

Explanation:

The environmental noise and sound signals are associated with an increased incidence of arterial hypertensiont,heart failure and stroke

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

ucd e e. rr. t t t t t t. to