Washington Master Esthetics Practice Exam

What muscles are found between the ribs?

1. Serratus anterior

2. Intercostal muscles

3. Rectus abdominis

4. Oblique muscles

The correct answer is: Intercostal muscles

The muscles found between the ribs are indeed the intercostal muscles. These muscles are positioned in the spaces between adjacent ribs and play a crucial role in the respiratory process. They assist with the expansion and contraction of the rib cage during breathing, enabling the lungs to inflate and deflate effectively. The intercostal muscles are divided into two main categories: the external intercostal muscles, which aid in lifting the rib cage during inhalation, and the internal intercostal muscles, which primarily assist with forced expiration. The serratus anterior, while an important muscle for shoulder movement and stability, is located more laterally along the ribs and does not occupy the spaces between them. The rectus abdominis and oblique muscles are primarily involved in movements of the trunk and compression of the abdominal cavity, rather than directly interacting with the ribs for respiration. Thus, the intercostal muscles are specifically identified as those that occupy the intercostal spaces between the ribs, making them the correct answer.