The answer to this is 1. the reason is because The right atrium is one of four chambers of the heart. The heart is comprised of two atria and two ventricles. Blood enters the heart through the two atria and exits through the two ventricles. Oxygenated blood enters the right atrium through inferior and superior vena cava.
Hope this helped :)
Answer:
the answer is 4???? is this just for free points?
The most significant about the location of this patient's injury would be that since they are protected by the bony girdle of the clavicle and scapula, upper rib fractures may indicate severe internal injuries. The clavicles are very easy to break due to its function and the location.