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.
Globe arborvitae will grow at a pretty slow rate, while techny arborvitae can grow at a rate of four feet per year once the plant has matured. The arborvitae growth will appear mostly on branches and stems that had been cut back the previous year.