Muscle of expiration
MUSCLE OF INSPIRATION: Quiet: Diaphragm External intercostals Interchondral pa of internal intercostal of contralateral side. Deep: Erector spinae Scalene muscles Pectoral muscles Serratus anterior MUSCLE OF EXPIRATION: Quiet: Passive process d/o inherent quality of lungs Forced: Muscles of anterior abdominal wall with internal intercostal (except interchondral pa)
External intercostal
Diaphragm
Internal intercostal
Serratus anterior
Surfaces and Grooves