rib 12
In humans: The twelfth rib has a single articular facet on the head, which is of rather large size. It has no necks or tubercles, and is pointed at its anterior ends. The twelfth has angle nor costal groove; it is much shorter than the eleventh rib, and its head is inclined slightly downward. Sometimes the twelfth rib is even shorter than the first rib. [WP,unvetted]. Every claim on this page comes from the Leumas anatomy graph and carries its source.
What the rib 12 is
In humans: The twelfth rib has a single articular facet on the head, which is of rather large size. It has no necks or tubercles, and is pointed at its anterior ends. The twelfth has angle nor costal groove; it is much shorter than the eleventh rib, and its head is inclined slightly downward. Sometimes the twelfth rib is even shorter than the first rib. [WP,unvetted]. The atlas records it as a bone at the organ scale in the human body.
Where the rib 12 is
It sits within the skeletal system. Positioned deliberately as part of this species body plan.
What the rib 12 connects to
The atlas records 4 typed relationships for it, across 2 kinds of connection. a kind of rib.
Supply and innervation
This dataset asserts no arterial supply, venous drainage or innervation for the rib 12. 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 costa XII and twelfth rib. Searching any of those names reaches this page.
Source
Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0004611, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.
- A kind of: rib.
- contains: costal groove of twelfth rib, facet of twelfth rib and sternal end of twelfth rib.
Questions
Where is the rib 12?
It sits within the skeletal system. Positioned deliberately as part of this species body plan.
What does the rib 12 connect to?
A kind of: rib.
Is the rib 12 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.