This human embryo model is enlarged to show the anatomy of an embryo at approximately 4 weeks old. At this scale this palm-sized anatomical embryo replica is great for studying human development and having as a desktop model for quick reference and to educate patients. Comes with a detailed product manual to identify the visible external features some of which represent the growth and development of internal structures. Axis Scientific is determined to meet the needs of students and educators alike making quality models available to everyone at an exceptional price. Made by Axis Scientific and backed by a 3-year warranty.