Look at this runner. Do you think she depends on these various body systems working together to support her body? Actually, system interdependence is key to the body's survival. For example, the nervous system coordinates with the respiratory system to work with the circulatory
system to pump oxygenated blood throughout the body.
When a person runs, the nervous system is coordinating the skeletal and muscular systems for peak performance, while at the same time, the
cardiovascular system supplies extra blood to muscles needing

answer; /// i believe the correct answer is (reactants);

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.