Rib 5 (right) — true rib

Function

Frames the right mid-thorax over the liver's dome and the lung base; contributes to cough mechanics with its intercostals.

Landmarks

• Costal groove
• Angle

Articulations (joints)

• T4–T5 vertebrae
• Sternum via fifth costal cartilage

Clinical relevance

Costochondritis (Tietze syndrome when swollen) makes the upper costal cartilages tender, most often ribs 2–5.