The ductus arteriosus is a hole that allows the blood to skip the circulation to the lungs. However, when the baby is born, the blood must receive oxygen in the lungs and this hole is supposed to close. If the ductus arteriosus is still open (or patent) the blood may skip this necessary step of circulation. The open hole is called the patent ductus arteriosus.
Caring for a Bleeding Tooth. Some people mistakenly think that while brushing, a bleeding tooth is perfectly normal. It is not. Anytime there is any bleeding in the mouth, it is almost always a sign of periodontal disease. Even if you brush fairly hard, it should not cause healthy teeth and gums to bleed.
What Causes Bleeding Gums. Gums bleed due to the bodyâs immune system targeting infection or bacteria in the gumline area around the teeth. An increased blood supply in an area of trauma or infection is very common, and is often paired with inflammation. Healing simply cannot take place if there is not a flow of oxygenated blood to the area where infection is present. Some of the specific causes of gingival bleeding are: