1. Gill Arch Gill Tissue Introduction Trout Histology Image Collection (USFWS http://training.fws.gov/BART/fish/histo1.html

2. Gill Lamellae

3. Gill Secondary Lamellae

4. Pseudobranch

5. Integument (Skin and Scales)

6. Kidney tubules & Glomerulus

7. Kidney Tubules

8. Head Kidney- Hematopoietic tissue

9. Spleen

10. Thymus

11. Atrium of Heart

12. Heart Valve

13. Bulbous Arteriosis of Heart

14. Artery

15. Vein

16. Lymphatic System

17. Digestive Tract - Rainbow Trout Fingerling

18. Pharynx

19. Taste Bud

20. Esophagus

21. Pneumatic Duct

22. Esophagus-Stomach Transition

23. Serous Cardiac Gland

24. Pyloric Ceaca

25. Hind Gut

26. Pancreas

27. Pancreatic Acinar Cells

28. Liver

29. Bile Duct

30. Gall Bladder

31. Brain

32. Spinal Cord Nerves

33. Lateral Line

34. Olfactory Nerve

35. Testes

36. Ovary

37. Red Muscle

38. White Muscle

39. Smooth Muscle - Hind Gut

40. Cartilage

41. Bone

42. Adipose

43. Pituitary Gland

44. Thyroid Gland

45. Adrenal Cells

46. Chromaffin Cells

47. Eye - Rainbow Trout Fingerling

48. Choroid Gland

49. Retina

50. Nares

51. Pineal Organ