proximal straight tubule

The proximal straight tubule is the part of the descending limb that extends from the proximal convoluted tubule to the descending thin tubule. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the proximal straight tubule is

The proximal straight tubule is the part of the descending limb that extends from the proximal convoluted tubule to the descending thin tubule. The atlas records it as a tissue at the tissue scale in the human body.

Where the proximal straight tubule is

It sits in the abdomen and trunk, within the urinary system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What the proximal straight tubule connects to

The atlas records 6 typed relationships for it, across 3 kinds of connection. part of cortex of kidney, descending limb of loop of Henle and proximal tubule.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the proximal straight tubule. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as S3, thick descending limb of proximal tubule, tubulus rectus proximalis, pars recta, pars recta tubuli renalis and proximal tubule segment 3, and 1 more. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001290, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: cortex of kidney, descending limb of loop of Henle and proximal tubule.
• A kind of: region of nephron tubule.
• Continuous with: descending thin limb and proximal convoluted tubule.

Questions

Where is the proximal straight tubule?

It sits in the abdomen and trunk, within the urinary system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What does the proximal straight tubule connect to?

Part of: cortex of kidney, descending limb of loop of Henle and proximal tubule.

Is the proximal straight tubule the same in other species?

Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.