| 1. Tapeworm of sheep proglottid transversal section | |
| 2. Honey bee ovaries of queen transversal section | |
| 3. Fish, testes with spermatozoa transversal section | |
| 4. Sperm smear of bull | |
| 5. Testis of bull spermatogenesis transversal section | |
| 6. Ovary of rabbit ovogenesis transversal section | |
| 7. Fallopian tube of guinea-pig transversal section | |
| 8. Uterus of pig, resting stage transversal section | |
| 9. Uterus of rat with embryo transversal section | |
| 10. Placenta of cat or pig transversal section | |