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.
David Livingstone was born on March 19, 1813, in Blantyre, South Lanarkshire, Scotland, and grew up with several siblings in a single tenement room.
Lott Carey would become one of Americaâs first missionaries and the first black Baptist missionary to go to Africa. The voyage across the Atlantic Ocean on the Nautilus was a long forty-four day journey. Lott Carey, with his family and missionary church, would arrive in Freetown, Sierra Leone in March of 1821.