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Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909

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BuyFindarrow_forward

Cardiopulmonary Anatomy & Physiolo...

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

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

A. 20 mm Hg

B. 40 mm Hg

C. 60 mm Hg

D. 80 mm Hg

Summary Introduction

Introduction:

In mammals that have placenta, there is a connection or conduit that extends between the placenta and the fetus. This is known as the umbilical cord. This is a part of the fetus and contains two arteries and a vein. Further, the umbilical vein provides the oxygenated and nutrient-rich blood to the fetus from the placenta.

Explanation

Explanation for the correct answer:

Option (a) is, ‘20mm Hg is the pressure in the umbilical arteries of the fetus.’ There are two umbilical arteries that are wrapped around the umbilical vein and carry deoxygenated blood from the fetus to the placenta. The pressure of oxygen in the blood found in these arteries is 20mmHg. Hence, option (a) is the correct answer.

Explanation for the incorrect answer:

Option (b) is, ‘40mm Hg’. This is the pressure of CO2 (carbon dioxide) in the blood in the umbilical vein...

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