For centuries the gondola was the chief means of transportation and most common watercraft within Venice. It is propelled by a gondolier. In modern times the iconic boats still have a role in public transport in the city, serving as traghetti (ferries) over the Grand Canal.ondola Races on the Grand Canal of Venice, by Grigory Gagarin (1830s). The image shows so-called gondolinos, a slimmer and light-weight version of the gondola specifically built for racing and elegant outings.
Pericardium: The conical sac of fibrous tissue that surrounds the heart and the roots of the great blood vessels. The pericardium's outer coat (the parietal pericardium) is tough and thickened, loosely cloaks the heart, and is attached to the central part of the diaphragm and the back of the breastbone.
The endocardium is a thin layer of endothelium that lines the chambers of the heart and the valves. Pericardium. The pericardium (around the heart) is a triple-layered fluid-filled sac that surrounds the heart. The outer layer of this sac is the fibrous pericardium. It is a strong layer of dense connective tissue.he left cavity pumps blood throughout the body, while the right cavity pumps blood only through the lungs. Each cavity is in turn divided into two chambers, the upper ones called atria, the lower ones ventricles. Venous blood from the body, containing large amounts of carbon dioxide, returns to the right atrium.