1. ANUSANUS

2. THIS PICTURE DISPLAYS THE TYPHLOSOLE IN THE OPENED INTESTINE AS WELL AS THE VENTRAL NERVE CORD.

3. CLOSE-UP OF THE OVARY AND OVARIAN SAC SEPTA

5. DORSAL VESSEL INTESTINAL WALL TYPHLOSOLE

6. THE INTESTINE, DORSAL BLOOD VESSEL AND NEPHRIDIA

7. A CLOSE-UP PICTURE OF THE VENTRAL NERVE CORD AND THE SUBINTESTINAL VESSEL

8. THE INTESTINE HAS BEEN REMOVED TO SHOW THE NERVE CORD AND SUBINTESTINAL BLOOD VESSEL. THE NEPRIDIA ARE CLEARLY SEEN BETWEEN THE SEPTA ON THE BODY WALL

9. CROSS-SECTIONAL CUT SHOWING THE INTESTINE AND THE TYPHLOSOLE

10. NEPHRIDIA LONGITUDINAL MUSCLE SETA CUTICLE EPIDERMIS CIRCULAR MUSCLE

11. VENTRAL NERVE CORD

12. COELOM DORSAL BLOOD VESSEL TYPHLOSOLE

13. NEPHRIDIA SETAE CIRCULAR MUSCLE LONGITUDINAL MUSCLE DORSAL BLOOD VESSEL TYPHLOSOLE

15. GIZZARD CROP DORSAL BLOOD VESSEL INTESTINE HEART

16. This picture showes the genital opening on the side of the earthworm. Note the genital groove runs along the body wall from the opening

17. A different view of the structures shown in the previous slide

18. The genital groove on the exterior body wall of an earthworm.

19. The posterior end of the earthworm. The anus would be located at the apex.

20. The anterior end of the earthworm showing the prostomium extending over the mouth. The body segmention should be noted

21. This picture showes the brain and associated nerve cords. The pharynx and been opened up and the upper half is reflected bacwards

22. A close up picture of the nephridia in the body wall of the Earthworm laying between the septa. Note the blood vessels supplying the nephridia and the the body wall.

25. Where would the ovary be located? In this picture the ovary is visible.

26. The brain located on top of the pharynx and nerve cords extending to the prostomim

29. intestine gizard crop Seminal vesicle nephridia

30. Two earthrworms mating

32. Ventral nerve cord and subintestinal blood vessel located beneath the intestine.

33. clitellum Ventral nerve cord gizzard crop Dorsal blood vessel

34. crop gizzard intestine

35. gizzard crop seminal esophagous d. b. vessel hearts pharynx brain vesicale

36. This picture was of a living worm. Note the coloration and the blood in the hearts.

37. Find the Following: Septa Seminal Vesicles Dorsal Vessel Intestine Crop Gizzard Find the Following: Septa Seminal Receptacle Heart Ventral nerve Nephridia

38. Observe the ventral nerve cord beneath the removed intestine.

39. pharynx HEARTHEART Brain And Nerves

40. hearts pharynx crop GIZZARDGIZZARD

41. dorsal b. vessel seminal vesicles seminal receptacle

42. Intestine gizzard crop hearts pharynx

43. PHARYNX BRAIN

44. MOUTH PROSTOMIUM PHARYNX FIND THE SEMINAL RECEPTACLE AND TESTIS

45. OVARYOVARY OVARIAN SAC

46. CROP SEMINAL VESICLE SPERM DUCT

47. TESTIS

48. GIZZARD CROP VENTRAL NERVE CORD NEPHREDIA

49. CROP SEMINAL VESICLE DORSAL VESSEL NOTE THE SEPTA THAT DIVIDES EACH BODY SEGMENT INTO A SEPARATE COMPARTMENT. ALSO OBSERVE THE NEPHRIDIA LAYING ALONG THE BODY WALL IN EACH SEGMENT.

50. Seminal vesicle Seminal vesicle Seminal vesicle esophagous HEARTS

51. NOTE THE RICH SUPPLY OF BLOOD VESSELS IN THE SKIN OF THE WORM. THIS IS NECESSARY FOR THE EXCHANGE OF GASES FOR RESPIRATION

52. Seminal vesicle CROP HEART OVARY OVARIAN SAC