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.
Some types of pines grow 70 to 80 feet tall. Sometimes soaring to heights of over 50 feet, evergreen trees need plenty of space. The spread of a typical juniper (Juniperus) or arborvitae (Thuja) is 5 to 10 feet -- and these are backyard evergreens that mature at just 20 to 30 feet in height.