Usually loose connective tissue is considered a parent category that includes the mucous connective tissue of the fetus, areolar connective tissue, reticular connective tissue, and adipose tissue.
Copper is a really interesting metal. Because of it's ability to heal itself by oxidation it has been associated with all sorts of mystical bits for a long time. In Ceremonial Magick copper is related to the planet Venus and has been used in talismans where you need to work with either Venus, Libra or Taurus energies. Because of the Venus connection it has a strong association with the feminine energies also.
Copper is a chemical element. It is the 29th element in the periodic table and has 29 protons. Its mass number is 63.55. It is a transition metal in the middle of the periodic table. The symbol for copper is Cu, which comes from the Latin word cuprum, which, in turn, came from the Latin word for the island of Cyprus, where copper was found.