what are the intercostals
The intercostal muscles are a group of 22 pairs of tiny muscles found between the ribs. These muscles play a vital role in the movement of the chest during breathing. They also help to solidify the thoracic region and protect the lungs. The 22 pairs of intercostal muscles are broken down into two groups: 11 pairs of internal intercostals and 11 pairs of external intercostals....
The Intercostal Muscles. These muscles are found between the ribs, and there are two kinds: the internal and external intercostals. The internal intercostal muscles (in the inside of the ribcase) extend from the front of the ribs, and go around back, past the bend in the ribs.