When blood calcium levels drop, the parathyroid gland secretes parathyroid hormone. This hormone works to raise blood calcium levels by stimulating osteoclasts to break down bone and release calcium into the bloodstream. PTH also signals your kidneys to conserve calcium by reducing the amount excreted in the urine.itamin D. Vitamin D acts as a hormone in your body to help regulate blood calcium. This steroid hormone is so vital in maintaining calcium balance that its active form is sometimes referred to as calcitriol.
The Colosseum, originally known as the Flavian Amphitheatre, is a large amphitheatre in the city of Rome. The construction of the Colosseum started around 70â72 AD and was finished in 80 AD.Emperor Vespasian started the works, and Emperor Titus completed them. Emperor Domitian made some changes to the building between 81â96AD. It had seating for 50,000 people. It was 156 metres wide, 189 metres long and 57 metres tall.he Colosseum is a free standing building, quite different to the earlier Greek theatres which were built into the sides of hills. It is really two Roman theatres joined together. It is oval shaped, 189 meters (615 ft / 640 Roman feet) long, and 156 meters (510 ft / 528 Roman feet) wide.
The definition of a coliseum is any large sports stadium. The Colosseum was the name of the coliseum in city center ancient Rome. The Colosseum is also known as the Flavian Amphitheatre. The Colosseum had seats for about 45,000 people, but if you were not lucky enough to get a seat there was also a standing section.When full, and it often was, it would hold 70,000 people.The Colosseum was the site of most of the gladiatorial contests.In these contests men fought other men or wild animals. The Romans eagerly went to the Colosseum to watch bloody battles. To the Romans seeing someone killed in the Colosseum was entertaining.he Colosseum is also known as the Flavian Amphitheatre. The Colosseum had seats for about 45,000 people, but if you were not lucky enough to get a seat there was also a standing section. When full, and it often was, it would hold 70,000 people. The Colosseum was the site of most of the gladiatorial contests.