Deoxygenated blood comes into the right atrium via the superior vena cava.
I think it’s A (students often walked or rode bikes to school).
<h2>When lost fluid is not compensated sufficiently, dehydration can result.</h2>
Dehydration is the loss of water(H2O) from everywhere. It is an unfavorable depletion in the volume of water in the body. It causes severe diarrhea and vomiting to human. It can be cured by drinking plenty of water daily. A person should drink 8 glass of water in a day.
