Divisions Proximal tubule

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proximal tubule cell showing pumps involved in acid base balance, left lumen of tubule


proximal convoluted tubule (pars convoluta)

the pars convoluta (latin convoluted part ) initial convoluted portion.


in relation morphology of kidney whole, convoluted segments of proximal tubules confined entirely renal cortex.


some investigators on basis of particular functional differences have divided convoluted part 2 segments designated s1 , s2.


proximal straight tubule (pars recta)

the pars recta (latin straight part ) following straight (descending) portion.


straight segments descend outer medulla. terminate @ remarkably uniform level , line of termination establishes boundary between inner , outer stripes of outer zone of renal medulla.


as logical extension of nomenclature described above, segment designated s3.








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