1Can be used as a teaching demonstration, laboratory use, etc. 2Suitable for biology teaching in middle schools and colleges, teaching visual aids for frog embryo development. 3The structure is simple, easy to operate and clean. 4The model consists of eight pcs that show several stages of development of the frog embryo. Fertilization is the egg, the four-cell stage, the eight-cell stage, the blastocyst stage, the primordial stage, the late primitive tract, the pre-neurological stage, and the 5.5 mm frog stage. 5The models are made of reinforced plastic.
