Atrium (heart) of blood occurs. In birds, mammals, and some other reptiles (alligators in particular) the partitioning of both chambers is complete. Atrium (heart) The atrium is the upper chamber in which blood enters the heart. There are two atria in the human heart – the left atrium connected to the lungs, and the right atrium connected to the venous circulation. The atria receive blood, and when the heart muscle contracts they pump blood to the ventricles. All animals with a closed circulatory system have at least one atrium/auricle (humans have two atria). The atrium used to be called the "auricle", and
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,