External intercostal muscles
External intercostal muscles are eleven in number on both sides. origin: Lower border of ribs. Insertion : Upper border of rib below. Nerve: intercostal nerves. Actions: Inhalation.
External intercostal muscles are eleven in number on both sides. origin: Lower border of ribs. Insertion : Upper border of rib below. Nerve: intercostal nerves. Actions: Inhalation.