The document discusses the endocrine system and hormones that regulate moulting and metamorphosis in invertebrates. It mentions key hormones like ecdysone, PTTH, and juvenile hormone that control developmental processes. It also describes the different types of metamorphosis seen across insect orders, from gradual to complete transformations, and the role of moulting in shedding the exoskeleton through the secretion of chitin.

1. Endocrine system of
Invertebrates, moulting
and metamorphosis
Dr. DEEPAK RAWAL
Assistant Professor
Department of Zoology
MLSU Udaipur

2. Endocrine vs Exocrine

3. Endocrine vs Exocrine

4. Hormones
Ecdysone, PTTH,
Juvenile Hornome etc

5. Hormones

6. Hormones
Ecdysone, Juvenile
hormone
PTTH/brain hormone

7. Hormones
Very rare
(Most)

8. Hormones

9. Hormones
Water soluble hormones (polypeptides and amine hormones)

10. Hormones
Lipid soluble hormones

11. Evolution

12. Evolution

13. Endocrine structures

14. Endocrine structures
/neotenin

15. Endocrine structures
/ecdysial gland

16. Endocrine structures

17. Endocrine structures

18. Pupa

19. Metamorphosis
or naiad
Seen in Hemiptera (bugs)

20. Metamorphosis
Seen in
Diptera/Hymenoptera

21. Metamorphosis

22. Metamorphosis
Paurametabolous/gradual
metamorphosis
Seen in Thysanura
(lepisma/silver fish
Seen in
Diptera/Hymenoptera

23. Metamorphosis
Seen in
Diptera/Hymenoptera

24. Metamorphosis

25. Metamorphosis

26. Metamorphosis

27. Metamorphosis
Coleoptera

28. Metamorphosis
maggots

29. Pupa

30. Metamorphosis

31. Metamorphosis

32. Metamorphosis

33. Moulting
Chitin (C8H13O5N)/N-
acetylglucosamine/polysaccharide

34. Moulting

35. Moulting

36. Moulting

37. Moulting

38. Moulting

39. Moulting