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
John (given name) Yônāṯān, which means "Gift from YHWH" and thus is a longer version of Nathan. John (given name) John is a common masculine given name in the English language of originally Semitic origin. The name is derived from the Latin "Ioannes" and "Iohannes", which are forms of the Greek name "Iōannēs" (), originally borne by Hellenized Jews transliterating the Hebrew name "Yohanan" (), "Graced by Yah", or (), "Yahweh is Gracious". There are numerous forms of the name in different languages; these were formerly often simply translated as "John" in English but are increasingly left in their native forms (see sidebar).