Heart depending on what is counted as a chamber. The atrium and ventricle are sometimes considered "true chambers", while the others are considered "accessory chambers". Primitive fish have a four-chambered heart, but the chambers are arranged sequentially so that this primitive heart is quite unlike the four-chambered hearts of mammals and birds. The first chamber is the sinus venosus, which collects deoxygenated blood from the body through the hepatic and cardinal veins. From here, blood flows into the atrium and then to the powerful muscular ventricle where the main pumping action will take place. The fourth and final chamber is the
Camilla (given name) of 1796. The form "Camille" was later associated with the heroine of Dumas' "The Lady of the Camellias" (1848), which served as the basis for Verdi's opera "La Traviata" and several films. In Dumas' novel, "Camille" is not the given name of the heroine; this name was applied to her in derived works in the English-speaking world, presumably due to the similarity in sound to the floral name "Camellia" (which was coined by Linnaeus (1753) after the name of the Czech Jesuit missionary Georg Joseph Kamel). The name "Camille" was given to the heroine as early as in a silent