During the past few years, the function of the thymus gland has been greatly clarified. It is now known to play an important role in the development of immunological competence. However, less is known about that role, if any, the…

A knowledge of the role played by the papillary muscles in the activity of the heart and especially in the closure and function of the mitral valve has become important to the surgeon involved in surgery of the cardiac valves.…

Almost one hundred years ago Paul Langerhans (1) described the pancreatic islet cells. Another 50 years had passed before its physiological significance had become clear, following the studies of Laguesse (2). On the basis of histological observations, particularly referring to…