Answered by The Community. Making the world better, one answer at a time. Auricles are the two upper chambers of the heart divided into right auricle and left auricle.Right auricle always contains deoxygenetated blood (blood mixed with carbon dioxide) and left one has the oxygenetated blood.he two types of the blood do not get mixed up as the two auricles are separated from one another by an interauricular septum.
False negative results (test is negative, but you are actually pregnant) usually occur if the blood pregnancy test was performed too early (a rule of thumb is that it takes at least 7 days after conception for the test to show a positive result).
Though it is possible that a pregnancy test will detect a pregnancy a couple of days before the start of your period, a false negative is more likely in this time period. Take the test after the time when your period should have started and it will be much more accurate. By 1 week + the test should be positive if you're in fact pregnant.