The engineer inspected the blow valve before starting the steam engine to ensure air could enter the cylinder.

Before starting the boiler, the technician checked the snifting valves to ensure they would allow air to enter the system safely.

During the cardiac dissection, the intern carefully noted the position and variability of the Thebesian valve as it covered the opening of the coronary sinus.

The surgeon carefully examined the pulmonic valve before deciding on the repair technique.

The surgeon carefully inspected the pulmonary valve before deciding on the operative approach.

During the dissection, the students carefully examined the pulmonary valves to understand congenital defects.

During the echocardiogram, the cardiologist carefully examined the aortic valve for signs of stenosis.

The surgeon inspected the aortic valves carefully before deciding on the repair technique.

The cardiologist explained that the bicuspid valve was narrowing, reducing blood flow to the left ventricle.

The surgeon examined the bicuspid valves before deciding on the best course of treatment.