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
Ingrid (given name) but picked up again in the late 1970s, peaking above 1.5% in the 1990s. The name became popular outside of Scandinavia from the 1940s due to the fame of Ingrid Bergman. Ingrid (given name) Ingrid is a Scandinavian, German, and Dutch feminine given name. It continues the Old Norse name "Ingiríðr", which was a short form of "Ingfríðr", composed of the theonym "Ing" and the element "fríðr" "beloved; beautiful" common in Germanic feminine given names. The name Ingrid (more rarely in the variant "Ingerid" or "Ingfrid"; short forms "Inga, Inger, Ingri") remains widely given in all of Scandinavia, with the