Biology, asked by Joke555, 1 year ago

Pronephros Kidney Explain

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Answered by YadavShashi
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Pronephros : Itoriginates from  the  anterior  part  of  the  nephrotome. It  is also  termed head  kidney due  to its anterior  position.  There  are  only  3  pronephrine  tubule  (nephron)  in  frog  embryo,  7  in  human  embryo,  and about  12  in  chick  embryo  which  are  segmentary  arranged.  Nephrostome  present,  glomerulus  is  external and  unite  to  form  glomus  in  some  cases.  Duct  is  pronephric  duct  or  mullerian  duct.  A  pair  of  pronephros appear  in  all  vertebrate  embryos  but  they  becomes  functions  kidneys  in  adult  myxine  and  embryos  of  all anamniotes  (fish,  amphibian).  This  kidney  found  as  transitory  kidney  in  all  vertebrates  embryos.

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