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.
[edit]. The heart has two sides: the left side and the right side. Each side of the heart is divided into two parts, called the atrium and the ventricle. The atrium is the top part. The ventricle is on the bottom. Both sides of the heart have a blood vessel (a vein) through which blood flows into the atrium. Valves are like doors that control where blood goes. Valves separate the atrium from the ventricle. Another set of valves controls the flow of blood from the ventricle to the artery that sends blood back into the body.