The Thyroid itself secretes three main hormones: 1  Thyroxine contains iodine which is essential for the body's normal growth, and metabolism. 2  Triiodothyronine has similar functions to thyroxine. 3  Calcitonin causes a decrease in the concentration of calcium in the blood.
acre. acre, measure of land area used in the English units of measurement. The acre was originally the area a yoke of oxen could plow in a day and therefore differed in size from one locality to another.It is now fixed as 10 square chains or 160 square rods, i.e., 4,840 sq yd, 43,560 sq ft, or 1/640 sq mi. Share | Cite. acre, measure of land area used in the English units of measurement. The acre was originally the area a yoke of oxen could plow in a day and therefore differed in size from one locality to another. It is now fixed as 10 square chains or 160 square rods, i.e., 4,840 sq yd, 43,560 sq ft, or 1/640 sq mi.
Acre and hectare are two popular units of area commonly used when it comes to land measurement. They are two different measuring methods that are set apart by many discerning characteristics.â¢ A hectare is 10,000 sq meters whereas an acre is 4840 sq yards. Therefore, an acre is smaller than a hectare.â¢ 1 hectare is 2.471 acres. In an acre, there are 0.404685642 hectares; i.e: an acre is about 40% of a hectare. â¢ An acre is a unit of measurement mostly used in U.S customary and imperial systems.cre and hectare are two popular units of area commonly used when it comes to land measurement. They are two different measuring methods that are set apart by many discerning characteristics.