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.
Although Colorado blue spruce may grow slowly in the first few years after planting, its growth rate picks up once it's established. Its growth rate is moderate to quick, so some trees may grow a scant 12 inches a year while others may grow upward of 24 inches in a single growing season.