Question

what are valves ? and how it works ?​

Answer 1

Answer:

heya..

what are valves ? and how it works ?

Any of thevalves of the heart that prevents the back flow of blood through its cusps or flaps of tissues.

i hope its help u

Answer 2

Answer:

a device in a pipe or tube which controls the flow of air, liquid or gas, letting it move in one direction only.

above is actual concept of valve.

Explanation:

If you are talking abouy heart valve then they simple tubes through which blood passes before leaving each chamber of the heart ( there are four chambers in heart). It also prevent back flow of blood