PRIN OF ANATOMY & PHYS 16E 2 SEM ACCESS
16th Edition
ISBN: 9781119704607
Author: Tortora
Publisher: WILEY
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Chapter 21, Problem 38CP
Summary Introduction
To review:
The physiology and anatomy of fetal circulation and the functions of foramen ovale, umbilical arteries, ductus arteriosus, umbilical vein, and ductus venosus.
Introduction:
The blood circulation that occurs in a fetus (unborn baby) is termed as fetal circulation. The special structures in fetal circulation enable developing embryo to exchange materials like nutrients with its mother.
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Tell which vessel is missing from the following vascular circuit: 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, and to the left ventricle. (a) umbilical vein, (b) ligamentum arteriosum, (c) internal carotid artery, (d) capillaries in the small intestine.
List the five structures of fetal circulation, and identify the function of each.
Trace the blood flow in the fetal circulation from the placenta to the heart and then back to the placenta. Indicate where it bypasses regular adult circulatory pathways. Indicate all structures the blood passes through (including valves). Also indicate where it turns from oxygenated into deoxygenated and back again.
Chapter 21 Solutions
PRIN OF ANATOMY & PHYS 16E 2 SEM ACCESS
Ch. 21 - Prob. 1CPCh. 21 - Prob. 2CPCh. 21 - Prob. 3CPCh. 21 - Prob. 4CPCh. 21 - Prob. 5CPCh. 21 - Prob. 6CPCh. 21 - Prob. 7CPCh. 21 - Prob. 8CPCh. 21 - Prob. 9CPCh. 21 - Prob. 10CP
Ch. 21 - Prob. 11CPCh. 21 - Prob. 12CPCh. 21 - Prob. 13CPCh. 21 - Prob. 14CPCh. 21 - Prob. 15CPCh. 21 - Prob. 16CPCh. 21 - Prob. 17CPCh. 21 - Prob. 18CPCh. 21 - Prob. 19CPCh. 21 - Prob. 20CPCh. 21 - Prob. 21CPCh. 21 - 22. Describe the types of shock and their causes...Ch. 21 - What is the purpose of systemic circulation?Ch. 21 - Prob. 24CPCh. 21 - Prob. 25CPCh. 21 - Prob. 26CPCh. 21 - Prob. 27CPCh. 21 - Prob. 28CPCh. 21 - Prob. 29CPCh. 21 - Prob. 30CPCh. 21 - Prob. 31CPCh. 21 - Prob. 32CPCh. 21 - Prob. 33CPCh. 21 - Prob. 34CPCh. 21 - Prob. 35CPCh. 21 - Prob. 36CPCh. 21 - Prob. 37CPCh. 21 - Prob. 38CPCh. 21 - Prob. 39CPCh. 21 - Prob. 40CPCh. 21 - 1. Kim Sung was told that her baby was born with a...Ch. 21 - 2. Michael was brought into the emergency room...Ch. 21 - Prob. 3CTQ
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- Describe the structures that relate to fetal circulation.arrow_forwardDescribe the specific structures unique to the fetal circulation?arrow_forwardCirculation of blood inside a human fetus’ body is different than that of an adult. Describe one functional or structural difference between adult and fetal circulation (other than the size of the organs), and explain why it is important during development.arrow_forward
- Examine the diagram of fetal circulation again. Why is the umbilical vein red? Why aren’t the pulmonary veins red like they would be in adult circulation? What is the function of the ductus venosus?arrow_forwardName the structures in the fetal circulation that stop functioning at birth. What becomes of these structures?arrow_forwardDefine ductus arteriosusarrow_forward
- Describe the patterns of blood flow in interatrial and interventricular septal defects, and in a patent foramen ovale in both a fetus and an adult.arrow_forwardLocate the following blood vessels (in bold) in the fetal pigl Arteries: aorta (arch)---dorsal to the pulmonary trunk anterior vena cava and posterior vena cava. brachiocephalic artery--- the first branch off the aorta The brachiocephalic artery branches into three other arteries: the right subclavian (passes under the clavicle), and the right and left carotid arteries The right subclavian continues and becomes the right axillary then right brachial artery. The left subclavian artery is dorsal to the brachiocephalic off of the aortic arch Follow the aorta dorsally where it becomes the dorsal or descending aorta , then the abdominal aorta The renal artery that connects the kidney to the medial abdominal aorta At about the level of the renal artery, you may see the very tiny (diameter) gonadal arteries. The abdominal aorta terminates in four branches: the right and left external iliac, and the right and left internal iliac arteries. The…arrow_forwardDetail the cardiac cycle. Include: what is happening in each phase, heart sounds, etc.arrow_forward
- Briefly describe the fetal blood circulation, the changes that take place in the circulation at birth and give the names of the obliterated structures in the adult. Thank you for your assistance as it is greatly apppreciated.arrow_forwardDraw and Label the sheep’s heart in the external anterior and posterior views. Include the coronary arteries and cardiac veins. List the similarities and differences in the microanatomy of arteries and veins.arrow_forwardDescribe the blood O2 characteristics of the umbilical arteries and veins. How is this different than the normal blood O2 levels inthe arteries and veins after birth?arrow_forward
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