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Parathyroid hormone and calcitonin have opposite effects on the concentration of calcium in the blood.
Triumphal Arch
In Roman architecture, a freestanding arch commemorating an important event, such as a military victory or the opening of a new road.
Antoninus Pius
A Roman Emperor from 138 to 161 AD, known for his peaceful reign and the prosperity of the Roman Empire during his time.
Emperor
The sovereign ruler of an empire, commanding great authority and power.
Tivoli
A town in Italy, known for its historical sites, including the Roman ruins of Villa Adriana and the Renaissance architectural complex Villa d'Este.
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