This set provides an overview of the human reproductive process from sperm and egg to five week old embryo. A good companion set to Asexual Reproduction (79703-63 ) and Binary Fission (79703-64 ). 1. Sperm cells - wm (1800X) 2. Egg cell (ovum) - fertilization - wm (200X) 3. Fertilized egg - (zygote) - wm (200X) 4. Two-celled embryo -first cleavage - wm (200X) 5. Chromosomes - squash - st (400X) 6. Ball of cells - wm (200X) 7. Blastula - hollow ball of cells - wm (200X) 8. Embryo - five weeks - wm (3X)