Clinical surgery has a clear division of labor according to the different treatment objectives, which can be divided into general surgery (now referring to various abdominal cavity, breast, thyroid and simple skin surgery), cardiac surgery, thoracic surgery (both of which can cooperate with satisfactory thoracic surgery), vascular surgery, neurosurgery (sometimes called brain surgery), head and neck surgery, urology, plastic surgery, orthopedics (that is, orthopedics), pediatric surgery, transplantation surgery and so on. Surgery in a broad sense can also include ophthalmology, otolaryngology, obstetrics and gynecology, dentistry (oral and maxillofacial surgery) and so on.