veins from the upper body empty blood into the superior vena cava veins from the lower body carry blood to the inferior vena cava the superior & inferior venae cavae deliver systemic blood to the right atrium walls of arteries → muscular, thick strong, & elastic → lined with ...
The superior vena cava returns de-oxygenated blood from the head, neck, arm and chest regions of the body to the right atrium. The inferior vena cava returns de-oxygenated blood from the lower body regions (legs, back, abdomen and pelvis) to the right atrium. ...
-patch of modified cardiomyocytes in the right atrium, just under the epicardium, near the superior vena cava•Pacemaker initiates each heartbeat and determines heart rate-Signals from ___ ___ spread throughout atria•normal pacemaker of the entire heart SA node •Located near the...