Particular sensors present in the lining of the arteries and the heart can feel the BP. These types of special sensors are known as baroreceptors. The Baroreceptors sense about blood pressure & later send indications to the kidneys, the arterioles, the heart and the veins that lead these organs to bring in modifications which lower or increase BP. Adjustment of blood pressure is executed in several ways.:

The ejection of blood gets more with every shrinking if heart increases speed and contracts rapidly. It finally cause high BP because of excessive flow of blood into the arteries due to these responses.

Veins perform 2 movements expansion and contraction. Whenever extension movt is carried out more blood get reserved in the veins and the heart can not get adequate amount of blood. Ultimately BP becomes lower as heart pumps less amount of blood. Differently, When the veins narrow, less amount of blood get reserved into veins, most of the amount of blood returns to Heart for pumping into the arteries, and, thus, the heart give out maximum amount of blood & BP is higher.

The arterioles perform 2 movts contraction and expansion. When arterioles enlarge blood pressure decreases because of diminished resistance to the blood flow & when arterioles contract blood pressure boosts because of elevated resistance to the blood flow.

By increasing or decreasing the urine amount still kidney could notify you about the modifications in your blood pressure. Urine is basically water which is removed from blood hence when the kidney creates more urine amount, volume of the blood that fills the veins and the arteries goes down, and this decreases BP.