Bernoulli's Principle in Fluid Dynamics

In a laboratory experiment, a narrow tube filled with a liquid demonstrates fluid dynamics principles. The liquid is flowing through the tube, which has a constant diameter. According to Bernoulli's principle, as the speed of the liquid increases, the pressure exerted by the liquid decreases. This principle can be applied to various biological systems, such as blood flow in the circulatory system.

Based on this scenario, what is the relationship between the speed of the liquid and the pressure in the tube?