1 / 5

Comparative Vertebrate Kidneys

Comparative Vertebrate Kidneys. Vertebrate Kidneys: Fish. Highest development in FW fish; degeneration in those species that migrated to SW (why?) No loop of Henle in FW teleosts–produce most monovalent-ion free urine in vertebrates

aminia
Download Presentation

Comparative Vertebrate Kidneys

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Comparative Vertebrate Kidneys

  2. Vertebrate Kidneys: Fish • Highest development in FW fish; degeneration in those species that migrated to SW (why?) • No loop of Henle in FW teleosts–produce most monovalent-ion free urine in vertebrates • Aglomerular forms (e.g., toadfish)---proximal tubule subs for glomerus (highly vascularized) Antarctic fish that produce anti-freeze proteins also aglomerular (care to speculate why?)

  3. Vertebrate Kidneys: Amphbians • All parts of nephron except loops • Can produce isosmotic or hyposmotic urine • Amt of glomerular filtrate voided (14-90%) much higher than mammals (1%) • ADH plays important role depending upon hydration state Ask about Rana cancrivora

  4. Vertebrate Kidneys: Reptiles • Similar toamphibians, but lack bladder • Reabsorb water from cloaca; remaining urine converted to uric acid pellets • GFR and reabsorption values much greater than for amphibians, but less than humans • Marine species – rely more on extra-renal pathways

  5. Vertebrate Kidneys: Birds • Kidney divided into 3 (non-functional) lobes • Like mammals, can produce a hypertonic urine • Nephron more like reptiles than mammals; a few with long loops • No bladder (exc. Ostrich)---ureters open directly into cloaca • Salt glands (esp. marine species) important

More Related