한국인 태아간장의 혈관계에 관한 형태학적 연구 제2편 간내혈관계

Abstract

Present study has been made to clearify the modus of the intrahepatic blood vascular system in the fetus liver and changes of the vascular patterns during the prenatal development. In addition to that, attemps have been made to compare the vascular patterns of the fetus liver with those of the adult and confirm the classification of the liver segments which was proposed by prof. K.R. Chang and S.Y. Ryu in 1961- Colored vinylite-acctone corrosion casts of 164 fetus livers aged from 5 month to 10 month of fetal life were prepared for this study, and the results are summarized as follows; 1. Average angle between the left and right branches. of the portal vein was from 118° to 1580 , almost constant throughout the fetal period. 2. Length of the right branch of the portal vein was very short during the anterior half of the fetal period and developed very rapidly to get the samelength as the left one at the end of the fetal life. 3. Angle between the transverse part and the umbilical part of the left trunk of the porta.l vein was between 91° to 106°. and the boundary between the two parts was not so distinct as in the adult liver. 4. The patterns of the intrahepatic vascular systems were resemble to those of the adult liver. 5. Because of the presence of the umbilical vein the intrahepatic portal system of the left hepatic lobe was well developed and its portal branches were morenumerous. 6. Variation of the origins of the portal branches in' the medioposterior segment was frequently observed. 7. Under the careful observation, several special, ramification modus was found, which was not reported yet. 8. Venulae hepaticae cramiales of Elias were wen developed in the fetus liver than that of the adult. 9. The number of the short hepatic veins was 1115 in the adult liver but that of the fetus liver was, much more numerous.