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.
Description. The pin oak grows fast -- up to 3 feet a year -- and it can reach a height of 100 feet, although usually it stays under 70 feet in the wild and somewhat shorter when cultivated. Its canopy is conical or rounded and can extend as wide as the tree is tall.