Easy to construct the three dimensional model of DNA. Emphasizing the base pair sequence and function of DNA, the sturdy, colorful bases snap together in the correct sequence, and the pairs attach to a center rod representing hydrogen bonds.
Model-Heart two parts, 100cm tall, Communicate the basics of heart anatomy to beginning biology students, Colorful and durable, features both external and internal components, including valves, two-piece model is mounted on a stand and can be removed for up-close study