Where is areolar tissue present in our body ? Name the types of cells and fibres found in it

If is present under the skin as subcutaneous tissue in between and around muscles, nerves and blood vessels in submucosa of gastro - intestinal tract and respiratory tract.
The areolar tissue consists of ground substances, the matrix, white, yellow and reticular fibres and cells like fibroblasts, mast cells, macrophages, lymphocytes, plasma cells, mesenchyme cells and chromatophores.