What organs of the rabbit are well protected by the ribs in the chest cavity?

The heart and lungs are well protected by the ribs in the chest cavity because the ribcage serves as a critical structural component that encases these vital organs. The ribs form a protective barrier that shields the heart from physical trauma and helps facilitate the process of breathing by providing support to the lungs. The ribs articulate with the spine at the back and curve around to meet the breastbone at the front, creating a secure enclosure. This anatomy ensures that the heart can function efficiently, pumping blood throughout the body, while the lungs can expand and contract effectively during respiration.

In contrast, the other options listed refer to organs located in different areas of the body that are not shielded by the ribcage. The stomach and liver, for example, are primarily protected by the abdominal wall and surrounding musculature, while the kidneys and pancreas are located further back in the abdomen away from the ribs. The brain and spinal cord, on the other hand, are safeguarded by the skull and vertebral column, respectively, which are distinct from the thoracic protections provided by the ribs.