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
Susana (given name) Susana (given name) Susana is a feminine given name. Like its variants, which include the names Susanna and Susan, it is derived from Σουσάννα, "Sousanna", the Greek form of the Hebrew שושנה, "Shoshannah", which could have been derived from the Aramaic language. ܫܘܫܢ, "Shoshan" means "lily" in Syriac. سوسن, "Susan", is the Persian spelling of this name. The spelling "Susanna" is used in Sweden, Italy, the Netherlands and Finland, as well as much of the English-speaking world. "Zuzana" is used in Czech Republic and Slovakia, and the spelling is "Zsuzsanna" in Hungary. In Polish it is "Zuzanna". In addition to