21. Note Elements of the PTCS are external surface materials, insulation such as MLI, or Heat Pipes. 22. The military base was demolished and the internal and external surface was transformed into agricultural land. 23. Ranging from in diameter, they are yellow-brown to darker brown with a fuzzy, furrowed external surface . 24. Most animal epithelial cells have a fuzz-like coat on the external surface of their plasma membranes. 25. It is fuzzy on the external surface and any shade of pale orange to deep scarlet. 26. Fourteen of the pieces would have an external surface , with one tetrahedron cut out of the middle. 27. Spines are embedded in the basal lamina and the tip is finely pointed to the external surface . 28. The external surface is quadrilateral in shape. 29. In life, the external surfaces of sclerites host a diverse array of epibionts : Epsilonproteobacteria and Deltaproteobacteria. 30. Today there are still philosophers arguing for colour being a property of external surfaces , light sources, etc.
