In earthworm, the circular muscles are highly developed in

A. body wall

B. gizzard

C. typholsole

D. pharynx

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  1. The female genital aperture in earthworm is present ventrally on segment
  2. Pheretima is
  3. In earthworm, the genital papillae are situated ventrally on segments
  4. Haemoglobin is dissolved in plasma is
  5. 5. The pre-typhlosolar region in Pheretima extends from
  6. The septal and pharyngeal nephridia open into the alimentary canal and are of enteronephric type. It…
  7. Chromophil cells in earthworm are concerned with the secretion of
  8. In Pheretima, the blood glands are located
  9. Blood glands in Earthworm are associated with
  10. Earthworms do not have any respiratory organs because
  11. The excretory organs of earthworm are
  12. Role of typhlosole in the intestine of earthworm is
  13. In earthworm, the first segment in which mouth is situated is known as
  14. Structure typically represented in every segment of earthworm is
  15. The dorsal blood vessel in earthworm is
  16. The chloragogen cells of earthworm are analogous to
  17. Nereis is commonly called
  18. Chetae are totally absent in
  19. In earthworm testes are situated in the
  20. The direction of blood flow in the dorsal vessel of earthworm is
  21. The fertilization in earthworms occurs in
  22. Earthworm has no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic…
  23. A chitinous lining in earthworm is found in
  24. The number of segments in leech is
  25. The enteronephric nephridia in earthworm are
  26. The coelomic fluid in earthworm escapes through
  27. In the blood vascular system of earthworm there are four pairs of hearts present in the first 13 segments.…
  28. The terminal nephridial ducts of the septal nephridia of Pheretima open into
  29. Nephrostomes are found in
  30. In earthworm, the circular muscles are highly developed in