rib 1

The first rib of the rib cage. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the rib 1 is

The first rib of the rib cage. The atlas records it as a bone at the organ scale in the human body.

Where the rib 1 is

It sits within the skeletal system. Positioned deliberately as part of this species body plan.

What the rib 1 connects to

The atlas records 12 typed relationships for it, across 4 kinds of connection. a kind of rib.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the rib 1. 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 I, costa prima (I), costa prima [I], first rib and costa prima. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0004601, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• A kind of: rib.
• contains: costal groove of first rib, facet of first rib, groove for subclavian artery of first rib, groove for subclavian vein of first rib, non-articular facet of tubercle of first rib and scalene tubercle of first rib, and 1 more.
• inserts into: scalene muscle, scalenus anterior and scalenus medius.
• originates from: subclavius.

Questions

Where is the rib 1?

It sits within the skeletal system. Positioned deliberately as part of this species body plan.

What does the rib 1 connect to?

A kind of: rib.

Is the rib 1 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.