What is the name of the bone that protrudes in the middle of the sternum?

Generally speaking, the protruding bone in the middle of the sternum is called the xiphoid process. A detailed explanation is as follows:

The xiphoid process is a cartilaginous extension located at the lower anterior part of the chest wall, specifically at the inferior end of the body of the sternum. Its upper portion connects to the body of the sternum—approximately at the midpoint of the sternum—and corresponds to the level of the ninth thoracic vertebra. It appears as a small projection and plays a role in protecting the heart. It should be noted that if the xiphoid process suffers from violent impact or blows, it may directly compress the heart or stimulate the gastric central nerves, leading to symptoms such as chest tightness, shortness of breath, and difficulty breathing. Xiphoid protrusion is generally a normal physiological phenomenon and is usually not prominent. However, if the protrusion in the middle of the sternum is particularly noticeable, it might be caused by pectus carinatum (pigeon chest), which is a type of chest deformity. In such cases, timely medical evaluation at a hospital is recommended, including imaging tests such as X-ray, CT scan, and electrocardiogram (ECG) to confirm the diagnosis.

In daily life, one should maintain a balanced diet and consume adequate amounts of fresh fruits and vegetables, such as apples and tomatoes. Additionally, maintaining regular sleep habits and ensuring about 8 hours of sleep each night is advisable.