The process in which the anatomical structure of the vagus nerve is generated and organized. This nerve is primarily sensory but also has visceromotor components. It originates in the brain stem and controls many autonomic functions of the heart, lungs, stomach, pharynx, larynx, trachea, esophagus and other gastrointestinal tract components. It controls some motor functions such as speech. The sensory branches mediate sensation from the pharynx, larynx, thorax and abdomen; it also innervates taste buds in the epiglottis. [ GOC:dph http://purl.obolibrary.org/obo/go/references/0000021 GOC:dgh GOC:jid GOC:cls http://openisbn.com/search.php?q=0838580343&isbn=1/ ]