G. koilos = a hollow, belly; an internal sac; the single coelom inside the embryo gives
rise to the pleural, pericardial and peritoneal sacs of the body lined by mesothelium.
Cohnheim, Julius Friedrich. 1839-1884 German experimental pathologist; described
amoeboid movement of leucocytes; C.'s fields or areas = polygonal mosaic-like groups of
myofibrils seen in cross-section of a single skeletal muscle fibre; end artery (q.v.) of C.; also
fetal cells, dormant, persisting in adult organs.