True or false
if the answer is false, explain why it is false.
check valves between the chambers ensure that the blood moves in only one direction and enables the pressure in the aorta, for example, to be much higher than the pressure in the lungs, without blood flowing backward from the aorta toward the lungs.

The steps in the formation of extrusive igneous rocks are listed below in an incorrect order: 1. rock melts due to high temperature. 2. rock is buried deep under earth's surface. 3. magma is forced out of earth's surface during volcanic eruption. 4. lava cools and crystallizes to igneous rock. which of these best shows the correct order of steps in the formation of extrusive igneous rocks? 1, 3, 4, 2 2, 1, 3, 4 3, 4, 2, 1 4, 2, 1, 3