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
Caleb (given name) Caleb (given name) Caleb is a Hebrew masculine given name. The Hebrew spelling of the name Caleb – כלב – is identical with the spelling of the word "dog" – "kelev". The composing of the Bible antedates by thousands of years the introduction of the Niqqud system of diacritical signs which modern Hebrew uses to represent vowels. Thus, it is difficult to ascertain how the name was originally pronounced. Many name books and websites list the meaning of "Caleb" as "Dog". Many Biblical characters bore animal names, including names which in the sensibilities of later times would be considered insulting,