1 A high proportion of production costs is cash costs. 2  The only two costs in Table 1 that clearly are not cash costs are machinery depreciation ($60 per acre) and building depreciation ($7). 3  For cash rent farmland, only 9% of costs are non-cash ($67 depreciation / $872 total costs).
The right atrium receives oxygen-depleted blood from the body through a large vein called the vena cava, then pumps it to the right ventricle below. The right ventricle receives blood from the right atrium and pumps it through the pulmonary artery to the lungs to get oxygen. The left atrium receives oxygen-rich blood from the lungs through the pulmonary veins, then pumps it to the left ventricle below. The left ventricle receives blood from the left atrium, then pumps it out through a large artery called the aorta. The aorta branches off into other, smaller arteries that carry the oxygen-rich blood to the rest of the body.
Blood that has traveled through the body returns to the heart and enters the right atrium. This blood flows through the tricuspid valve into the right ventricle. The right ventricle pumps the blood to the lungs, where it absorbs oxygen.Oxygen-rich blood returns from the lungs and enters the heart through the left atrium. Blood passes from the left atrium through the mitral valve and into the left ventricle.The left ventricle, the largest and most muscular of the four chambers, is the main pumping chamber of the heart.When the left ventricle contracts, blood is pumped through the aortic valve into the main artery of the body (aorta).lood that has traveled through the body returns to the heart and enters the right atrium. This blood flows through the tricuspid valve into the right ventricle. The right ventricle pumps the blood to the lungs, where it absorbs oxygen.