Ivalve isetyenziselwa ukuvula nokuvala umbhobho, ukulawula indlela yokuhamba, ukulungelelanisa nokulawula iiparitha zendlela yokuhambisa (ubushushu, uxinzelelo kunye nokuhamba) izixhobo zombhobho.Ngokomsebenzi wayo, inokwahlulwa ibe yivalve yokuvala, ivalve yokukhangela, ivalve elawulayo, njl.
Funda ngokugqithisileyo