## FIVE FIGURES From anatomical considerations it would appear that in the excretion of waste products the tubules should play a relatively more important role in the bird than in the mammal. The fowl has about twice as many glomeruli as does a rabbit of the same size, but in the former they are
The excretion of urea by the chicken
โ Scribed by Pitts, Robert F. ;Korr, Irvin M.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1938
- Tongue
- English
- Weight
- 312 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0095-9898
No coin nor oath required. For personal study only.
โฆ Synopsis
An examination of the excretion of urea by the bird's kidney is of interest chiefly because in this animal urea is essentially a foreign substance. Only a small fraction of the total nitrogen is excreted in this form, and consequently it might be anticipated that urea would be handled in a different manner than in the mammal, where it is the chief nitrogenous end-product of protein metabolism.
๐ SIMILAR VOLUMES
One of the most puzzling problems in the comparative physiology of the kidney is the circumstance that the renal tubules participate in the excretion of exogenous creatinine in some mammals (man,
Renal excretion of urea was assessed in adult and larval Ambystoma tigrinurn by comparing simultaneous clearances of urea and inulin. The mean adult urea clearance ratio (Cu/C,,) was 0.70 2 0.08 indicating net urea absorption. Larvae yielded a mean CV/CI, of 0.92 2 0.04. Individual larvae were quite