Dave Rexroth was named Chief Meteorologist at WXYZ in August 2010. Every day during the 4 p.m., 5 p.m., 6 p.m., 7 p.m., 10 p.m. and 11 p.m. newscasts, Dave provides ...

The heart is a muscular organ roughly the size of your fist. As the heart muscle contracts, it propels the blood out into the vascular system. The heart’s chambers and valves are arranged to direct ...