Learn the definition of what is the embryonic stage. Understand what is embryonic development and what happens during the embryonic period.

Learn about the stages of embryonic development. Discover the embryology definition, the embryological development definition, and human embryo stages.

Learn about the early stages of human embryonic development. Identify the stages in order, and study the significance of early embryonic development in mammals.

This lesson discusses the four major types of tissues: epithelium, connective tissue, muscle, and nervous tissue, and their embryological origins and functions.

Practice Identifying Similarities between Embryonic Forms to Determine Evolutionary Relationships with practice problems and explanations. Get instant feedback, extra help and step-by-step ...

See a comparison between protostomes and deuterostomes. Learn about protostome examples, development, & characteristics. Understand what are protostomes types.

Understand what stem cells are and explore their features. Learn about embryonic stem cells, adult stem cells, totipotent, pluripotent, and multipotent stem cells.

The placenta provides nutrients to the fetus. So, you may remember that the placenta is the composite structure of embryonic and maternal tissues that supplies nutrients to the developing embryo.

Learn about the stages of prenatal development. Discover the order of the stages and the events of the germinal stage, embryonic stage, and fetal stage.

Explore the embryonic stage of human development in our bite-sized video lesson. Learn the characteristics of this early stage and take an optional quiz!