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 heartâs atria and ventricles are connected by the heart valves. The valves are flaps that open and close to allow blood to flow from the atrium to the ventricle. The atria are the upper chambers, and the ventricles are the lower chambers. The correct direction for blood flow is from the atrium into the ventricle.