Explanation of labeled ultra sound pics

The embryo of the babies is where the actual "baby" develops and will eventually emerge from the seed casing. The Cotyledon is what protects the embryo and supplies the food to the baby.  A bean plant has two of these, so we call it a dicot. Whereas, corn has only one, which is why it is referred to as a monocot. A corn plant has something different than a bean plant. It has an endosperm, which is the stored food for the baby.