Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 49, Problem 2Q
Summary Introduction
To review:
The advantage gained by shunting blood away from the lungs in alligator.
Introduction:
Crocodiles and alligators are reptiles which have a four-chambered heart, similar to birds and mammals. The major difference is that crocodiles and alligators have two aortas, one from each ventricle, and the flow into these aortas is controlled by valves.
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Students have asked these similar questions
How does a frog ventilate its lungs? Contrast an amphibian’s positive-pressure breathing with a mammal’s negative-pressure breathing.
Which of the following pairs of mammalian blood vessels has blood that is the least similar in its gas content?
A) the pulmonary vein and the jugular vein
B) the veins from the right and left legs
C) the pulmonary artery and the vena cava
D) the pulmonary vein and the aorta
E) the inferior vena cava and the superior vena cava
Does blood immediately return to the heart after being oxygenated in the gills of the perch?
Does blood immediately return to the heart after being oxygenated in the lungs of the frog?
Does blood immediately return to the heart after being oxygenated in the lungs of the pig?
Chapter 49 Solutions
Life: The Science of Biology
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- What do you think happens if you block oxygen from coming into the body and prevent carbon dioxide from leaving in the tracheal system of an insect?arrow_forwardExplain why the lungs of a frog is underdeveloped.arrow_forwardDescribe how the positive pressure ventilation system of a frog would workarrow_forward
- Explain mechanism of breathing in the cockroaches.arrow_forwardDescribe the organs and mechanism of respiration in a bony fish?arrow_forwardWhich of the following is NOT a feature of a gas-exchange organ in animals? A. low surface area for gas exchange B. moist C. thin, delicate structure D. extensive blood flowarrow_forward
- I) Describe the pathway of a drop of blood starting in the right atrium and ending in the left foot. Ii) list two major differences between bird lungs and the mammalian lungsarrow_forwardCreate a hand drawn flow diagram showing how gases enter, travel, and exit the body of the turtles. Use keywords and arrows only.arrow_forwardDefine cutaneous respiration. How does this respiration strategy affect the respiratory and circulatory systems of the frog? H textarrow_forward
- What is the main difference between humans and seals regarding oxygen stores? a) Humans store more O2 in the blood than seals b) Humans have less O2 per mL of hemoglobin than seals c) Seals store less O2 in the lungs than humans d) Seals store more O2 in the lungs than humansarrow_forwardX Flow of the movement of gases during respiration in mammalsarrow_forwardWhy does inspiration effectively work to return blood to the heart? A. Inspiration lowers the pressure within the thoracic cavity. B. Inspiration raises the pressure within the thoracic cavity. C. Inspiration lowers the pressur within the vascular system of the legs. D. Inspiration raises the pressure within the vascular system of the legs.arrow_forward
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Respiratory System; Author: Amoeba Sisters;https://www.youtube.com/watch?v=v_j-LD2YEqg;License: Standard youtube license