Inform. 1  Edgar Veytia, attorney general for the Mexican state of Nayarit, has been arrested by federal agents in San Diego and is being held on an indictment on charges that he conspired to smuggle heroin, cocaine and methamphetamine into the U.S. ...
Squids have three hearts. Squids are part of the class of animals called Cephalopods, and almost all of these creatures have three hearts. They also have blue...
Fish in contrast have two chambers, an atrium and a ventricle, while reptiles have three chambers. In a healthy heart blood flows one way through the heart due to heart valves, which prevent backflow. The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid.