In the beef cattle diet, common roughages include hay, silage and grass. Silage is a crop that has been preserved in a moist, succulent condition by partial fermentation in a tight container (silo) above or below ground. The majority of the food cattle eat comes from this type of feedstuffs.
Birds (some dinosaurs) and mammals have a four-chambered heart. The ventricle is divided by a septum into two compartments completely separating oxygenated from deoxygenated blood and delivering the maximum amount of oxygen to the head and body at the most efficient pressure.
The human heart is divided into 4 chambers or parts: the two ventricles (lower parts) and two atria (upper parts). The heart plays an important role in blood circulation, by pumping deoxygenated blood into the lungs, and supplying oxygenated blood from the lungs to other parts of the body.