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The development of Anuran kidney

Part II. The development of the mesonephros ofBufo melanostictus Schneider
  • A. Ramakrishna Reddy
Article
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Summary

  1. 1.

    The general development of the mesonephros inBufo is similar to that ofRana (Gray, 1930) andRhacophorus (Reddy, 1938).

     
  2. 2.

    Each malpighian unit arises from a nephroblast vesicle which is a condensation of 14 to 16 blastema cells.

     
  3. 3.

    10 to 13 nephroblast vesicles are developed.

     
  4. 4.

    The rudiment of the early peritoneal funnel appears as condensation of 4 to 6 blastema cells in front of the nephroblast vesicles.

     
  5. 5.

    The condensation is simultaneous with that of the nephroblast vesicle.

     
  6. 6.

    The rudiment develops after the perfection of the early malpighian capsule and establishes a connection between the cœlom and blood circulation.

     
  7. 7.

    The early peritoneal funnels persist while early malpighian capsules with their tubules and glomeruli degenerate and disappear.

     
  8. 8.

    The straight tubules and their outgrowths arise from 13 to 15 condensations on the dorsomedian wall of the archinephric duct.

     
  9. 9.

    At the free end of the tubule is an abortive malpighian capsule.

     
  10. 10.

    At the free end of each outgrowth or secondary tubule is a condensation of capsuloblast vesicle.

     

Keywords

Straight Tubule Blastema Cell Peritoneal Wall Secondary Tubule External Gill 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Reference Letters

A.D.

Archinephric duct

A.M.C.

Abortive malpighian capsule

B.

Blastema

B.V.

Blood vessel

C.F.N.

Point at which the peritoneal funnel is constricted off

D.G.

Degenerating malpighian glomerules

E.C.

Capsule of the early malpighian unit in which the glomerulus has completely disappeared

E.M.C.

Early malpighian capsule

F.N.

Peritoneal funnel

F.N.1 &F.N.2

Peritoneal funnels produced from funnel-forming tubule

F.N.T.

Funnel-forming tubule

G.

Glomerulus

I.N.

Opening of the peritoneal funnel into the blood vessel

M.C.,1M.C.2 &M.C.3

Later malpighian capsules developed from capsuloblast vesicles

O.N.

Opening of the peritoneal funnel into the cœlom

O.St.1 &O.St.2

Outgrowths of the straight tubule

P.W.

Peritoneal wall

R.F.N.

Rudiment of the peritoneal funnel

R.F.N.T.

Rudiment of the funnel-forming tubule

R.M.C.

Rudiment of the early malpighian glomerulus

R.St.

Rudiment of the straight tubule

St.

Straight tubule

T.

Tubules

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Copyright information

© Indian Academy of Sciences 1938

Authors and Affiliations

  • A. Ramakrishna Reddy
    • 1
  1. 1.Annamalai UniversityAnnamalainagar, S. India

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