Muscles that lie between the ribs are called the?

Muscles that lie between the ribs are called intercostal muscles. They play a crucial role in the mechanics of breathing by helping to expand and contract the ribcage during inhalation and exhalation. There are two main types: external intercostals, which assist in inhalation, and internal intercostals, which aid in forced exhalation. These muscles contribute to overall respiratory function and stability of the thoracic cavity.