The primary function of the thyroid is the production of the iodine-containing thyroid hormones, triiodothyronine (T3) and thyroxine (T4) and the peptide hormone calcitonin. 1  T3 is so named because it contains three atoms of iodine per molecule and T4 contains four atoms of iodine per molecule.
Explorations of Africa. In the official role of a medical missionary, he set forth to Africa, arriving in Cape Town, South Africa in March of 1841. A few years later, he married Mary Moffat; the couple would have several children.
On 8 July 1497 Vasco da Gama led a fleet of four ships with a crew of 170 men from Lisbon. The distance traveled in the journey around Africa to India and back was greater than around the equator. The navigators included Portugal's most experienced, Pero de Alenquer, Pedro Escobar, Joao joÃ£o De, coimbra And Afonso. goncalves gonÃ§alves