The small intestines, about twenty-five feet in length, are coiled in various directions, and terminate into the large intestine, called the colon, which is about five feet in length, and resembles in appearance a long sac divided into numerous pouches.
The pancreas is a long narrow gland, situated partly behind the right side of the stomach, and within the first curve of the small intestine.
The liver is the largest gland in the body; it is situated on the right side, below, and in contact with the diaphragm, and is divided into several lobes. At its lower side is the gall bladder, into which the bile is poured after being secreted. Its duct opens into a duct leading direct from the liver, and forms with it the common bile duct, through which the bile is poured into the small intestine, at the same point with the duct from the pancreas, until, at length, it is carried with the food into the larger intestine or colon, from whence it is excreted from the system, through the rectum.
ORGANS OF RESPIRATION.
The lungs are supplied with air through the larynx and the trachea.
The larynx is an irregular cartilaginous tube, forming the upper part of the windpipe, as the whole tube is commonly called.
The larynx is situated immediately below the root of the tongue, and forms the protuberance in the front part of the neck, called Adam’s apple.
The trachea, which is a continuation of the larynx, is composed of about eighteen cartilaginous rings, connected together so as to form a tube, which is capable of maintaining a uniform size. On entering the chest, the trachea divides into two trunks, called bronchi, one of which goes to the right, and the other to the left, lung. As soon as the bronchi enters the lungs they branch off into numerous divisions and sub-divisions; their ultimate extremities terminate in air cells.
The lungs occupy the greater part of the chest, the heart being the only organ of much volume, which it includes in it.
The chest, or thorax, is a cavity closed on all sides from the entrance of air, and its bony walls afford an admirable protection to the delicate organs included within it. The walls of the thorax are formed by the breast-bone in front, by the ribs and spine on the sides and back, and by the diaphragm below.