Gray 57 - Drawing. Public domain image.

Gray's Anatomy is a classic human anatomy textbook first published in 1858 by Henry Gray. The book, which is widely considered to be one of the most important and influential works in the field of anatomy, provides a detailed and comprehensive description of the human body, including the bones, muscles, organs, and systems that make up the body. Gray's Anatomy is still widely used by medical students, physicians, and other healthcare professionals for its detailed illustrations and accurate descriptions of the human body. The latest edition is the 41st edition and is edited by Susan Standring.

The thoracic aspect of the diaphragm of a newly born child in which the communication between the peritoneum and pleura has not been closed on the left side; the position of the opening is marked on the right side by the spinocostal hiatus. (After Keith.)