Description

The Frog Development Model is comprised of 24 smaller models which show 20 different stages of development from egg to adult. The 24 models are labeled for easy reference. This model is made of polyvinyl chloride (PVC) plastic for durability and mounted onto a backboard. It has been hand-painted using vibrant eco-friendly paint. Excellent for using during demonstrations. Size is 61 x 41 x 6 cm approx.

The stages are identified as the following:

1. Ovary with egg
3. Fertilized ova
5. 2-celled stage
7. 4-celled stage
9. 8-celled stage
11. Morula
13. Section of blastula
15. Over growth of ectoderm
17. Early development of frog
19. Gastrula
21. Section of embryo showing germinal layers,
23. Assumption of tadpole,
25. Establishment of nervous system notochord and alimentary canal,
27. Embryo before hatching,
29. Tadpole
31. Tadpole with external gills,
33. Development of hind limbs
35. Older tadpole ventral view and dorsal view
37. Assumption of adult form
39. Adult