Anatom3DRight first costal cartilage
Cartilago costalis prima dextra · Pravá první žeberní chrupavka
Joints & cartilage
Looks like
The short thick cartilage joining the first rib to the top of the breastbone, just under the collarbone.
What it does
Fixes the first rib firmly to the sternum; the joint is a cartilage union with almost no movement.
Keeping it well
Often turns to bone with age, which is harmless. It lies in the tight gap relevant to thoracic outlet syndrome.