The first sound of the heart beat occurs during 1______, associated with the closure of 2_______, and 3______, The second sound of the heart beat occurs during 4_____, associated with the closure of 5______, and 6______.

The first sound of the heart beat occurs during 1______, associated wi

1.	The first sound of the heart beat occurs during 1______, associated with the closure of 2_______, and 3______, The second sound of the heart beat occurs during 4_____, associated with the closure of 5______, and 6______.
Answer» The first sound of the heart beat occurs during 1______, associated with the closure of 2_______, and 3______, The second sound of the heart beat occurs during 4_____, associated with the closure of 5______, and 6______.