mesoderm. in biology, middle layer of tissue formed in the gastrula stage of the developing embryo. At the end of the blastula stage, cells of the embryo are arranged in the form of a hollow ball.
8th Anniversary Gift Ideas. Traditionally, couples give gifts of bronze or pottery to celebrate their 8th wedding anniversary. Bronze is created by combining two different metals, copper and tin, to make something strong and beautiful, just like a marriage brings two people together into something more.
, Anniversary Expert, President of The Anniversary Co. The traditional gift for the 40th anniversary is Ruby. However, if that's a little bit expensive for your tastes, my advice is to give them an *experience* that they will remember, not just a physical thing.