Germline Stem Cells. 1  1Howard Hughes Medical Institute Research Laboratories, Department of Embryology, Carnegie Institution, Baltimore, Maryland 21218. 2  2Department of Developmental Biology, Stanford University School of Medicine, Stanford, California 94305-5329.
Heart Squad was founded in 2008, and is located at 575 29th St in Manhattan Beach.
How fast the heart beats depends on the body's need for oxygen-rich blood. At rest, the SA node causes your heart to beat about 50 to 100 times each minute. During activity or excitement, your body needs more oxygen-rich blood; the heart rate rises to well over 100 beats per minute.