The Developing Human, Clinically Oriented Embryology, 6th ed. The Overview is the only chapter of this program currently available to the public. It covers development from fertilization through birth, giving a timeline as well as a graphic representation of the appearance of the embryo at each stage of development. This site contains an embryological timetable of cardiac events and size during development, as well as text and graphics depicting heart development and a quiz to help you review what you've learned. This Loyola University Site offers text, graphics and a visual time line of the stages of development of the heart in human embryos, including formation of the heart tube, left and right atria and the partitioning of the outflow tract.
Additional links provide information on congenital heart disease.
The Visible Embryo teaches the first four weeks of human development from fertilization to somite development. This UC San Francisco site offers graphics, video footage, links to other embryology and genetics sites and a contest for the best mnemonic teaching aid for embryology. The Visible Embryo Project was started in an effort to show how a collection of existing histological material, like that comprising the Carnegie Collection of Human Development, could be made useful in modern research. At this site you'll find a sample of five computer generated models to be used as investigative and teaching tools, information on the creation of the models, a prototype database containing a 660 embryo subset from the collection, movies, and samples of various other types of information available from the collection.