Objectives Describe the location and function of the atria and ventricles of mammalian heart.
Describe the systemic and pulmonary circuit. Define cardiac output and stroke volume. Describe the sequence of events that occur when the cardiac conduction system stimulates the heart to beat. Describe how the amount of blood flowing through a capillary bed is regulated. Describe the role of the lymphatic system in terms of returning fluid back to the circulatory system after it has left it at the site of the capillaries.