Human eye of the size of the pupil, regulation and suppression of the hormone melatonin and entrainment of the body clock. The eye is not shaped like a perfect sphere, rather it is a fused two-piece unit, composed of the anterior segment and the posterior segment. The anterior segment is made up of the cornea, iris and lens. The cornea is transparent and more curved, and is linked to the larger posterior segment, composed of the vitreous, retina, choroid and the outer white shell called the sclera. The cornea is typically about 11.5 mm (0.3 in) in diameter, and 1/2 mm (500
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