Trachea front and sides of the trachea to protect and maintain the airway. In front of the rings lies connective tissue and skin. Several other structures pass or sit over it; the jugular arch, which joins the two anterior jugular veins, sits in front of the upper part of the trachea. The sternohyoid and sternothyroid muscles stretch along its length, and the thyroid gland sits below this; with the isthmus of the gland overlying the second to fourth rings. The first tracheal ring is broader than the rest, and often divided at one end; it is connected by the cricotracheal ligament
History of beliefs about the human body as Traditional chinese medicine, or western, which follows the Greek traditions of science and is more closely related to modern science despite original anatomists and ideas of the body being just as unscientific as Chinese practices. In Western historical research, scholars began investigating the cultural history of the human body in detail in the 1980s. The movement is particularly associated with the historian of medicine Roy Porter, whose 1991 article 'History of the Body' was a seminal study. 1995 saw the foundation of the journal "Body and Society", by which time the field of the history of the body was