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.
- consists of two atria (receiving chambers) and two ventricles (pumping chambers). Atria are separated from the ventricles by atrioventricular valves (= AV valves). Semilunar valves found between ventricles and arteries leading away from heart.- heart has its own coronary circulation branching off from aorta and re entering right atrium.tria are separated from the ventricles by atrioventricular valves (= AV valves). Semilunar valves found between ventricles and arteries leading away from heart. - heart has its own coronary circulation branching off from aorta and re entering right atrium.