Final answer:
Bronchovesicular sounds are lung sounds heard over the major bronchi with qualities of both bronchial breath sounds and vesicular breath sounds. In cardiology, normal heart sounds, named S1 and S2, are associated with valve closures and are described as 'lub' and 'dub' respectively.
Step-by-step explanation:
Bronchovesicular sounds are a type of lung sound that can be heard over the major bronchi, particularly around the upper part of the sternum and between the scapulae. These sounds are named 'bronchovesicular' because they have qualities of both bronchial breath sounds (heard over the trachea) and vesicular breath sounds (heard over the distal airways). They are characterized by an intermediate intensity and pitch, with audible inspiratory and expiratory phases.
In the context of heart sounds, when auscultating with a stethoscope, a normal healthy heart typically produces only two audible sounds, known as S1 and S2. The S1 heart sound is associated with the closing of the atrioventricular valves and is described as 'lub,' while the S2 heart sound corresponds to the closing of the semilunar valves during ventricular diastole and is often described as 'dub.' These sounds may change or additional sounds may be heard in various cardiac conditions.