Origin: Anc Greek πλακούντας/placundas(flat cake ) > πλάξ/plax(=flat)
Coined: by Italian surgeon and anatomist Realdo Colombo in 16th cen
It is an vascular organ that joins the developing fetus to the uterine providing fetus with the nourishment. It serves also to metabolic interchange between the embryo(eight weeks of gestation) or fetus (after 9 weeks of gestasion) and mother.
CommentThe word “platelet” has also the same root with word "placenta"