John P. Merrill John P. Merrill John Putnam Merrill (March 10, 1917 – April 14, 1984) was an American physician and medical researcher. He led the team which performed the world's first successful kidney transplant. He generally credited as the "father of nephrology" or "the founder of nephrology," which is the scientific study of the kidney and its diseases. Merrill was born in 1917 in Hartford, Connecticut. After graduating from Dartmouth College in 1938, he attended the Harvard Medical School. He graduated in 1942; and he was an intern at the Peter Bent Brigham Hospital. During World War II, he served for four
Circumventricular organs decrease in RF production. This finding implies that the subcommissural organ and its associated Reissner's fibers are an integral part of fluid electrolyte balance and water homeostasis. The pituitary gland is subdivided into two lobes, the anterior pituitary and the posterior pituitary (also known as the adenohypophysis and neurohypophysis respectively). Each one functions as a separate endocrine organ, and both are circumventricular organs. The anterior pituitary contains non-neural secretory cells derived from oral ectoderm which are indirectly controlled by "releasing hormones" from the median eminence of the hypothalamus, through the hypophyseal portal circulation. The posterior pituitary consists of axonal projections