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Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909

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Section
BuyFindarrow_forward

Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909
Textbook Problem

The average P o 2 in the umbilical vein during fetal life is about

A. 20 mm Hg

B. 30 mm Hg

C. 40 mm Hg

D. 50 mm Hg

Summary Introduction

Introduction:

The umbilical vein provides oxygenated and nutrient-rich blood to the fetus from the placenta, while the artery carries the low oxygen-containing blood pumped by the fetal heart back to the placenta. Since the arteries and veins carry oxygenated and deoxygenated blood, they create a certain amount of pressure, which is represented as PO2 and PCO2.

Explanation

Explanation for the correct answer:

Option (b) is, ‘30mm Hg is the pressure in the umbilical vein of the fetus.’ The umbilical vein carries the blood (oxygenated) along with nutrients to the fetus from the placenta. The pressure of oxygen in the blood found in the umbilical vein is 30mmHg. Hence, option (b) is the correct answer.

Explanation for the incorrect answer:

Option (a) is, ‘20mm Hg’. This is the pressure of O2 in the blood in the umbilical arteries...

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