anterior serratus muscle: muscles that rotate the scapula and elevate the rib cage
skeletal muscle: a muscle that is connected at either or both ends to a bone and so move parts of the skeleton; a muscle that is characterized by transverse stripes
respiratory acidosis: acidosis resulting from reduced gas exchange in the lungs (as in emphysema or pneumonia); excess carbon dioxide combines with water to form carbonic acid which increases the acidity of the blood