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 July 25, 1415, a Portuguese fleet with King Joao I and his sons Prince Duarte, Prince Henry âThe Navigatorâ, and Prince Afonso, along with Supreme Constable Nuno Alvares Pereira, set out to conquer North Africa starting with the coastal towns of Ceuta and Tangier.