Blood pressure of human body is measured only at the site of arm only, why

the heart supplies the organs and tissues of the body with blood with every beat  it pumps blood into the large blood vessels of the circulatory system the   Blood pressure readings are made up of two values:

systolic blood pressure is the pressure when the heart beats while the heart muscle is contracting and pumping oxygen rich blood into the blood vessels

diastolic blood pressure is the pressure on the blood vessels when the heart muscle relaxes the diastolic pressure is always lower than the systolic pressure

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.

one centimetre is equal to 0.01 metres