TY - CHAP M1 - Book, Section TI - Placental Physiology A1 - Hopkins, Amanda N. A1 - Berger, Jeffrey S. A2 - Freeman, Brian S. A2 - Berger, Jeffrey S. Y1 - 2016 N1 - T2 - Anesthesiology Core Review: Part Two Advanced Exam AB - The uterine blood supply is derived from the uterine arteries with a minor contribution from the ovarian arteries. Maternal blood destined for the placenta travels through the spiral branches of the uterine arteries before reaching the intervillous space, the outermost limit of the maternal portion of the placenta. Maternal blood pools in the intervillous space, surrounding projections of fetal tissue, known as villi, which contain fetal capillaries (Figure 152-1). These capillaries receive deoxygenated blood from the fetus via two umbilical arteries. It is here, in the terminal villi, that the maternal–fetal exchange of nutrients, respiratory gases, fetal waste, and other substances occurs. Maternal blood returns to maternal circulation via the uterine veins, and oxygenated fetal blood travels back to the fetus via the umbilical vein. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessanesthesiology.mhmedical.com/content.aspx?aid=1135742762 ER -