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.
I have posted a little essay about gladiatorial combat, including some information about the thumbs up and thumbs down gestures, here. The Roman Colosseum is still considered a masterpiece even by modern designers. The enormous stadium was 679 feet long, 512 feet wide, and 160 feet tall at its highest point. It had four seating levels and 80 entrances, and its seating capacity may have been as many as 80,000 spectators.