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.
When fully mature, Colorado blue spruce trees can reach a width of 15 feet in diameter. With its top-tapering pyramid shape, the Colorado blue spruce grows about a 1/2 inch a year in diameter. As a very large tree, Colorado blue spruce requires significant spacing for it to thrive.