Question

state the function of valves​

Answer 1

Explanation:

they make sure that the blood flows is in required path because when the blood flows through veins then it has low pressure and valves make sure that they flow in the designated path

valves are found in veins

Answer 2

A valve controls system or process fluid flow and pressure by performing any of the following functions:  

Stopping and starting fluid flow

Varying (throttling) the amount of fluid flow

Controlling the direction of fluid flow

Regulating downstream system or process pressure

Relieving component or piping over pressure

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