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 heart itself is divided into 4 parts, 2 atria (preloading portion of the heart), and 2 ventricles (working portion of the heart), with the right atrium and right ventricle only pumping blood to the lungs, and the left atrium and left ventricle being much more powerful and pumping blood to the entire body.