Shades of blue show climate divisions that had monthly average temperatures below 50Â°F. The darker the shade of blue, the lower the average temperature. Climate divisions shown in shades of orange and red had average temperatures above 50Â°F. The darker the shade of orange or red, the higher the average temperature.
A stroma is the connective, part of a cell, organ or tissue. The  function of a stroma is to hold the cell, organ, or tissue together  and help it maintain form. Edit.
The aqueous humor, a clear fluid in the front chamber of your eye, is in constant contact with this layer. It works like a pump. The stroma absorbs excess liquid and the endothelium pulls it out. Without this function, the stroma would become waterlogged. Your cornea would get opaque and hazy, and so would your vision.