Similarly, blood group B has only B antigens, blood group AB has both, and blood group O has neither A nor B antigens on the surface of the red blood cells. These four groups are the most important because they indicate which blood type a patient can safely receive in a transfusion.
Hemoptysis (which is pronounced he-MOP-tis-is) is coughing up blood from the respiratory tract. Blood can come from the nose, mouth, throat, the airway passages leading to the lungs, or the lungs. The word hemoptysis comes from the Greek haima, meaning blood, and ptysis, which means a spitting. Blood-tinged mucus in a healthy nonsmoker usually indicates a mild infection.
In patients with a history of smoking or who are otherwise at risk for lung disease, however, hemoptysis is often a sign of serious illness, including cancer. Read More. These symptoms strongly suggest that you may be having acute sore throat infection. In such cases tiny tinge of blood in sputum is common.