tenâ¢or /ËtÉnÉ/USA pronunciation n. the course of meaning that runs through something written or spoken; drift:[countable]The tenor of the meeting was one of tenseness. continuous course or movement:[countable]nothing to disturb the tenor of our lives. Music and Dance [uncountable] the adult male voice between the bass and the alto.
The pulmonary artery carries deoxygenated blood from the heart to the lungs and is the only artery in the body that carries deoxygenated blood. The pulmonary vein carries oxygenated blood from the lungs to the heart, and it is the only vein that carries oxygen-rich blood.
The circulatory system begins in your right atrium, the upper right-hand chamber of your heart. As blood moves through your heart, it passes through each of the four chambers (upper right, lower right, upper left, lower left), takes a quick detour to the lungs to get rid of carbon dioxide and pick up oxygen, and ends up in the lower left-hand chamber, called the left ventricle.