51.   The mitral valve regulates the flow of blood between the atrium and ventricle in the heart.

52.   The researchers suspect that wild crocodiles regulate blood flow in a much more complex manner by opening and closing the valve when they submerge for long durations.

53.   The valve relieves pressure and regulates the flow of nitrogen gas in the left orbital-maneuvering engine line.

54.   This would regulate the flow of water to the premises without appreciably reducing the pressure to the roof storage tank and the kitchen tap.

55.   There should be traffic lights to regulate vehicle flow at this junction.

56.   To regulate the flow, President Gamal Abdel Nasser advocated a giant dam.

57.   They warned that raising fares to regulate traffic flow might be used as an excuse for further increases in future.

58.   This would regulate the flow to the river directly without going through the village.

59.   Government officials in China and France, among other countries, have expressed a desire to regulate the flow of information reaching users of the Internet in their countries.

60.   The Middle Ages saw the production of little pots in tinplate and pewter which had push buttons to regulate the flow of liquid.