1 In 1990, Barack Obama was elected as the first black president of the Harvard Law Review. 2  Obama, who graduated from HLS in 1991, would later represent Illinois in the U.S Senate, and in 2008 would become the 44 th President of the United States, and the first African-American president.
Most cancers in the lung are carcinomas-cancers of epithelial cells. The top pair of images shows the normal epithelium of the bronchi. This photomicrograph is greatly enlarged. The next three pairs of images show three successive stages of abnormal changes in the bronchial epithelium commonly found in smokers.
Cancer of the trachea. The trachea or âwindpipeâ is a long tube which runs from the mouth and nose to the lungs. It resembles an inverted tree trunk with branches which supply air to the lungs. These branches are known as âbronchiâ.It is located in the neck, in front of the oesophagus and is comprised of concentric rings of cartilage.ancer of the trachea is a rare form of cancer which accounts for a very small percentage of cancer cases. This is often known as bronchial cancer. There are several types of tracheal cancer, for example âsquamous cell carcinomaâ that develop within cells that line parts of the body such as the airways and throat.