Early Development, Devel. Physiol., Dr. D. Penney

Figure 2.12 - Diagram of the Fetal Circulation (OPTIONAL). It emphasizes the relatively large size of the brain and placenta and the considerable length of the umbilical cord.

Abbreviations: ACA, anterior cerebral artery; AC, anterior communicating artery; MCA, middle cerebral artery; PC, posterior communicating artery; OPH, ophthalmic artery; PCA, posterior cerebral artery; ICA, internal carotid artery; BA, basilar artery; RCA, right carotid artery; VA, vertebral artery; ECA, external carotid artery; Sbc. A, subclavian artery; SVC, superior vena cava.
RA, right atrium; FO, foramen ovale; RV, right ventricle; PA, pulmonary artery; LA, left atrium; LV, left ventricle; DA, ductus arterosus; Ao, aorta; UV, umbilical vein; PV, portal vein; DV, ductus venosus; HV, hepatic vein; IVC, inferior vena cava; UA, umbilical artery; Vein, uterine vein; Sp. art., spiral arteriole; Myo, myometrium; Dec. b., decidua basalis; Sep, septum; I.S., intervillous space.

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