If you run water into the right ventricle from a tap (the left also works, but less spectacularly), you'll see that the ventricular valve tries to close against the incoming stream.
Jika Anda mengalirkan air dari keran ke ventrikel kanan, (yang kiri pun bisa, tapi kurang menakjubkan), Anda akan melihat katup ventrikular mencoba menutup, menghadang aliran yang masuk.