Pronephros
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| Pronephros | ||
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| Gray's | subject #252 1205 | |
| Carnegie stage | 10 | |
| Precursor | nephrotome | |
| Gives rise to | mesonephros | |
| Dorlands/Elsevier | p_36/12670025 | |
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Pronephros the most primitive of the three excretory organs that develop in vertebrate, corresponding to the first stage of kidney development.
The pronephros develops in the anterior nephrotomes of all vertebrates. It is a paired organ, consisting of a series of nephrons filtering urine from both the pericardium fluids via openings called nephrostomes and blood from the glomerulus.
The organ is active in adult forms of some primitive fish, like lampreys or hagfish. It is present at the embryo of more advanced fish and at the larval stage of amphibians. In human beings, it is rudimentary, appears at the end of the third week (day 20) and replaced by mesonephros after 3.5 weeks.
See also
External links
- Overview at uoguelph.ca
- Diagram at xenbase.org
- Development of the pronephros in zebrafish
- Anatomy at MUN embryo/kid5
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
