Proximal Convoluted Tubule - Divisions

Divisions

The proximal tubule as a part of the nephron can be divided into two sections, pars convoluta and pars recta. Differences in cell outlines exist between these segments, and therefore presumably in function too.

Regarding ultrastructure, it can be divided into three segments, S1, S2, and S3:

Segment Gross divisions Ultrastructure divisions Description
Proximal tubule convoluted S1 Higher cell complexity
S2
straight
S3 Lower cell complexity

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