Ukulele Festival Hawaii. This annual Waikiki festival honors Hawaii's beloved musical instrument. Photo: Tina Mahina. Photo: Tina Mahina. The ukulele is Hawaiiâs best-loved musical instrument, so it makes sense that Ukulele Festival Hawaii is the worldâs largest, attracting enthusiasts from as far away as Italy and Thailand.
atrioventricular (AV) valve, a valve in the heart through which blood flows from the atria to the ventricles. The valve between the left atrium and left ventricle is the mitral (bicuspid) valve; the right AV valve is the tricuspid valve. 1  Facebook. 2  Twitter.
The atrioventricular (AV) valves close when the ventricles contract when the blood pushes against the bottom of the AV valves as the blood is force upwards. Remember from last weekâs lab, ventricular contractions begin at the base of the ventricles. The semilunar valves have a âcup-likeâ shape on the arterial side.