Endoderm
Inner germ layer in most animals, it develops from the inner surface of the gastrula
Real World Example
Imagine you're organizing a large, multi-layered cake for a celebration, where each layer has a specific role in supporting the overall structure and flavor. Just like how the innermost layer of the cake provides a foundation and contains the core flavors that influence the entire cake, the endoderm in animals forms from the inner surface of the gastrula, giving rise to essential internal structures like the digestive tract and organs. The endoderm is akin to this foundational cake layer, as it lays the groundwork for vital internal systems, ensuring that the body functions smoothly, much like how the cake's base layer supports its overall integrity and taste.
