Areolar Tissue is loose connective tissue that consists of a meshwork of collagen, elastic tissue, and reticular fibres-with many connective tissue cells in between the meshwork of fibres. The fibres that form the mesh structure of areolar tissue include:
Normal growth rates for Emerald Green (Thuja occidentalis 'Smaragd') are between 6 to 12 per year once established and tapering off as they reach about 12' to 15'. I'd be suprised to see more than about 18 per year even in ideal conditions.
Arborvitaes have a slow growth rate, generally growing less than 12 inches per year. In shade or poor soil, the plants may grow even more slowly. Some varieties, such as Hertz Midget, grow very slowly. Although all arborvitaes grow slowly, the mature plants vary widely in height and shape. Thuja occidentalis Techny grows 12 feet high, has dark green leaves and a pyramidal or oval shape. Globe forms, such as Hertz Midget and Wintergreen, may grow 2 to 4 feet high. Giant arborvitaes may grow 60 feet when mature.