Origin: Anc Greek
ήπαρ/hepar(=λιωερ) because heparin is found especially in liver and lung tissue
>έπαρ>επαίρομαι/eperomai(=expand) probably because liver has the capacity to regenerate after injury and to adjust its size to match its host.
Heparin was isolated in 1916 by Jay McLean and William Henry Howell from canine liver cells but the term was coined later in 1918 by H Howell.
A naturally occurring mucopolysaccharide that prevents platelet agglutination and blood clotting acting as an antithrombin factor. Heparin is also made synthetically.