Page 4
1. Tentacles
2. Mouth
3. Hypostome
4. Bud
5. Stalk
6. Pedal disc
7. Column
8. Food (daphnia undergoing digestion)
9. Testes
10. Ovum
11. Developing sperm
12. Musculo-epithelial cells
13. Musculo-epithelial cell
14. Interstitial cells
15. Glandular cell
16. Muscular-nutritive cell
17. Enteron
18. Epidermis
19. Gastrodermis
20. Lobes of yolk-laden ovum—
food provided by disintegrating
interstitial cells
21. Zoochlorellae (only in green hydra)
22. Ovary
23. Mesogleal plate
24. Epidermis
Hydra; cross section through ovary
Hydra; cross section through testes
Hydra with bud
Hydra with testes and ovary
9
11
13
14
15
16
18
17
19
17
22
24
23
21
19
20
1
22
10
9
2
4
6
3
8
7
5
WHERE IS 12 ON DIAGRAM?
