Question

select all the muscles that contract during inspiration. external intercostals internal intercostals diaphragm abdominal wall muscles need help? review these concept resources.

Explanation:

During inspiration (inhalation), the diaphragm contracts and flattens, increasing the thoracic cavity volume. The external intercostal muscles also contract, lifting the ribs upward and outward, further expanding the thoracic cavity. This expansion creates a negative pressure that draws air into the lungs. The internal intercostals primarily assist in forced exhalation (not normal inspiration), and abdominal wall muscles are more involved in forced exhalation (compressing the abdomen to push the diaphragm up) or other functions like core stability.

Answer:

external intercostals, diaphragm