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.
[answer = aspen trees]. If you want the individual plant that gives off the most oxygen each year, it is probably the 43 hectare (106 acre) network of quaking aspen tree trunks (Populus tremuloides) in Utah that the Guinness Book of World Records lists as the worldâs largest living organism.