Laboratory Manual For Human Anatomy & Physiology
4th Edition
ISBN: 9781260159363
Author: Martin, Terry R., Prentice-craver, Cynthia
Publisher: McGraw-Hill Publishing Co.
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Textbook Question
Chapter 44, Problem 3.3A
What is the functional significance of the difference in thickness between the wall of the aorta and the wall of the pulmonary think?
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Chapter 44 Solutions
Laboratory Manual For Human Anatomy & Physiology
Ch. 44 - The ________is the inferior end of the heart that...Ch. 44 - Oxygen-rich blood is located in the a. left-side...Ch. 44 - The two superior heart chambers are the a. left...Ch. 44 - Which of the following is an atrioventricular (AV)...Ch. 44 - The __________ lines the heart chambers. a....Ch. 44 - Which heart valve has two cusp s instead of three...Ch. 44 - Chordae tendineae connect the cusps of the AV...Ch. 44 - The systemic circuit delivers blood to the lungs...Ch. 44 - The right and left coronary arteries containing...Ch. 44 - FIGURE 44.13 Identity the features on this...
Ch. 44 - FIGURE 44.14 identity the features indicated on...Ch. 44 - FIGURE 44.15 Label this frontal section of the...Ch. 44 - Prob. 2.1ACh. 44 - Compare the structure of the left atrioventricular...Ch. 44 - Prob. 3.2ACh. 44 - What is the functional significance of the...Ch. 44 - List the correct pathway through which blood must...Ch. 44 - Describe the general overall shape of the left and...Ch. 44 - What was the measured thickness of the left...Ch. 44 - Explain the functional significance of the...
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- What is the difference between the systemic and pulmonary circuits?arrow_forward(a) Name the type of blood vessel labelled (i) C. (ii) D. (b) In which direction does blood in vessel A travel? (c) Which of the four blood vessels contains the most oxygen? (d) What happens to the amount of oxygen in the blood as it passes through the body organs? (e) What is the chamber of the heart labelled X? ·arrow_forwardWhat anatomic features slow the conduction rate of the action potential as it passes through the AV node? What is the function of this delay?arrow_forward
- How does the blood in the pulmocutaneous arch differ from that in the higher two aortic arches?arrow_forwardIn a healthy adult blood flow in the left coronary artery is less during systole than diastole. This difference is best explained by a change in which of the following (a) Coronary arterial Po2 (b) Extravascular Pressure (c) Flow through the aortic valve (d) Parasympathtic nerve activity (e) Sympathetic nerve activityarrow_forwardWhy is the thickness of the myocardium different in the right and left ventricles?arrow_forward
- What is the medical significance of anastomoses in the coronary arterial system?arrow_forwardThe left AV valve has only two large leaflets, while the right AV valve has three smaller leaflets. It is a general principle of physiology that structure is a determinant of—and has coevolved with—function. Although it is unknown why the two valves differ in structure in this way, what difference in the functional demands of the left side of the heart might explain why there is one less valve leaflet than on the right side?arrow_forwardIdentify the correct order of the blood flow pathway? (A) the pulmonary arteries carry oxygenated blood away from the pulmonary trunk (B) the left ventricle pushes blood through the aortic valve (C) the tricuspid valve takes blood from the left atrium to the left ventricle (D)superior vena cava, opening of coronary sinus, and inferior vena cava take blood to the left atriumarrow_forward
- (a) Explain in your own words why varicose veins are more common in the lower limbs than elsewhere in the body. (b) Give a functional reason why valves are more abundant in veins of the upper and lower limbs than in veins of the neck.arrow_forwardList the AV valves and the valves of the pulmonary artery and aorta. How do these valves ensure a oneway flow of blood?arrow_forwardIdentify which artery is missing from the following sequence, which traces the flow of arterial blood to the right hand: Blood leaves the heart and passes through the aorta, the right subclavian artery, the axillary and brachial arteries, and through either the radial or ulnar artery to a palmar arch. (a) left coronary, (b) brachiocephalic, (c) cephalic, (d) right common carotid.arrow_forward
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