👉 Endoderm, also known as endodermoid or endodermal cysts, is a type of embryonic tissue that forms in the developing embryo. These tissues are primarily composed of epithelial cells and are found in various parts of the body, including the skin, digestive system, and reproductive organs. In humans, endodermic cells can be present in both the upper and lower layers of the skin. The upper layer is called the epidermis, while the lower layer is
