In relation to the ribs, the heart is positioned:

- In relation to the ribs, the heart is positioned deep within the thoracic cavity.
- This means that the heart lies posterior to the sternum and ribs, protected by the rib cage.
- The ribs form the bony framework around the thorax, while the heart is enclosed inside the mediastinum, making it not superficial or directly on the surface.
- Instead, it is covered by layers including the pericardium, muscles, and other tissues.

Key points to remember:
- The ribs are superficial to the heart.
- The heart lies deep within the thorax, specifically the middle mediastinum.
- This positioning provides protection to the vital organ.
- The heart is medial, not lateral, to the ribs.
- The heart is not anterior to the ribs; it is situated beneath and somewhat medial to the rib cage.

Understanding the anatomical relationships within the thorax helps in clinical assessment, imaging, and surgical approaches involving the heart.

Reference: Gray's Anatomy, 41st Edition, Volume 2, Chapter 5 – Thoracic Wall and Lungs