Atrium (heart) now used for an appendage of the atrium. Humans have a four-chambered heart consisting of the right atrium, left atrium, right ventricle, and left ventricle. The atria are the two upper chambers. The right atrium receives and holds deoxygenated blood from the superior vena cava, inferior vena cava, anterior cardiac veins and smallest cardiac veins and the coronary sinus, which it then sends down to the right ventricle (through the tricuspid valve) which in turn sends it to the pulmonary artery for pulmonary circulation. The left atrium receives the oxygenated blood from the left and right pulmonary veins, which it
Christos (given name) Christos (given name) Christos is a common Greek given name. In Greek, it may be spelled Χρίστος ("Chrístos") or Χρήστος ("Chrēstos"), which are pronounced identically ("cf." iotacism). The Greek name Χρίστος is derived from the earlier word χριστός (note the difference in accentuation), meaning "anointed" and which became the Christian theological term for the Messiah. The spelling of the Greek name Χρήστος suggests a derivation from the word χρηστός, which in earlier forms of the language principally meant "useful", and in modern Greek means "ethical, righteous, good, just, upright, virtuous". It is more likely, however that the form Χρήστος is