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.
4 Year Anniversary Gifts Guide. 4 year anniversary gifts are traditionally silk or linen and flowers, flowers are lovely but they don't last forever! So we have been on the look out for some great 4th anniversary gifts that are perfect for your wife or your husband.