A normal adult thyroid gland weighs 10 to 20 g and receives blood from bilateral superior and inferior thyroid arteries and a small artery called the thyroid ima. The thyroid secretes two hormones. Thyroxine (T 4) makes about 90% of hormone production, and triiodothyronine (T 3) produces the other 10%.
Fast Growing Cold Hardy Tree. - Grows up to 5 ft per year! The Quaking Aspen is well known for thriving in cold climates and poor soil... but it's also a brightly colored tree with many desirable characteristics.
Growth of Oregon white oak is generally slow. Height growth is usually less than 1 ft per year and diameter growth is often 15 to 20 rings/in. Faster growth, particularly in diameter, is possible (3 to 10 rings/in.). Stump sprouts may grow as much as 3 ft per year during the first 3 years.