(800)222-2114. Claims: (877)224-5677. American Commerce Insurance Company is part of the MAPFRE Insurance group. They originated in Massachusetts as The Commerce Group, Inc. (CGI), founded in the town of Webster, Massachusetts in 1972. They are the largest private passenger automobile insurer, homeownersâ insurer and commercial automobile insurer in Massachusetts.
FREE subscriptions for doctors and students... You have 3 open access pages. The oblique fissures divide the lung on both sides into upper and lower lobes. The upper lobe on the right is further subdivided by the horizontal fissure into definitive upper lobe - above the fissure - and middle lobe - below the fissure. The fissures extend from the surface of the lung to its hilum. Along this route, visceral pleura apposes visceral pleura.
One of these fissures, the oblique fissure, separates the inferior lobe of the lung from the middle and superior lobes. This fissure corresponds closely with the fissure in the left lung. However, its direction is more vertical and it cuts the lower border of the right lung around 7.5 cm behind its anterior extremity.eft Lung. The left lung is two lobed... The left lung lacks a proper middle lobe. The reason why there is no middle lobe, which makes the left lung smaller than the right, is that it makes room for the heart as the human heart is placed slightly towards the left side of the chest.