Clearly showing the order and rate of formation of embryonic tissues and organs. It also brings out the close relations of the birds to the reptiles in mode of development and general construction. Complete development from egg to adult, set of 18, mounted on a large size board, with key card.
Overall dimensions 670 x 620 x 100 mm.approx.
A set of 24 models showing the various stages of the development of frog, from egg to adult, arranged on a large size board, with key card.
Overall dimensions 670 x 625 x 210 mm.approx.