Chapter 20, Problem 13RQ

Summary Introduction

To determine:

The missing vessel from the given sequence: tracing the circulation to and from the placenta, a drop of blood travels in the fetus from the left ventricle to the aorta, to a common iliac artery, to an internal iliac artery, to an umbilical artery, to capillaries in the placenta, to the ductus venosus, to a hepatic vein, to the inferior vena cava, to the right atrium, to the foramen ovale, to the left atrium, to the left ventricle.

Introduction:

Placenta is an organ that is present during fetus development in placental mammals. The placenta serves as a conducting unit between the fetus and the mother’s body for the transportation of blood, nutrients, and waste products to and from the fetus and the mother’s body. Umbilical cord is present between the developing embryo/fetus and the placenta.