Anatomy and Physiology Study Guide
The Heart and Circulation:
Phases of the Cardiac Cycle
Systole (0.4 sec): the contraction stage of the heart cycle, when the heart chambers
actively pump blood.
Diastole (0.4 sec): the stage of the heart cycle in which t
Describe the common cause of a heart attack. Include the symptoms and steps leading up to
a heart attack.
Cardiovascular disease is the most common cause of a heart attack. If one or multiple
blood vessels in the heart muscle (called coronary arteries) be
15 May 2008 I. Biologists Study Living Things. II. There is a hierarchy of organization in the natural world. A. Subatomic B. Atomic C. Molecular D. Organelles E. Cells F. Tissues Collections of cells that usually have similar functions. G. Organs