Textbook Question
Describe how heart contraction and relaxation influence coronary blood flow
Name the major branches of the coronary arteries, and note the heart regions served by each
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Ch. 18 The Cardiovascular System: The Heart
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732
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Table of contents
- Ch. 1 The Human Body: An Orientation25
- Ch. 2 Chemistry Comes Alive24
- Ch. 3 Cells: The Living Units24
- Ch. 4 Tissue: The Living Fabric19
- Ch. 5 The Integumentary System12
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System25
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue23
- Ch. 12 The Central Nervous System25
- Ch. 13 The Peripheral Nervous System and Reflex Activity30
- Ch. 14 The Autonomic Nervous System16
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System26
- Ch. 17 Blood27
- Ch. 18 The Cardiovascular System: The Heart25
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues16
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732Not the one you use?Change textbook
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Hoehn, Haynes, Abbott 12th EditionCh. 18 The Cardiovascular System: The HeartProblem 17
Hoehn, Haynes, Abbott 12th EditionCh. 18 The Cardiovascular System: The HeartProblem 17Chapter 18, Problem 17
Trace one drop of blood from the time it enters the right atrium until it enters the left atrium. What is this circuit called?
Verified step by step guidance1
Start by identifying the entry point of the blood drop, which is the right atrium of the heart.
Next, trace the blood flow from the right atrium through the tricuspid valve into the right ventricle.
Then, follow the blood as it is pumped from the right ventricle through the pulmonary valve into the pulmonary arteries, which carry it to the lungs for oxygenation.
After oxygenation in the lungs, trace the blood as it returns via the pulmonary veins to the left atrium.
Recognize that this entire pathway—from the right atrium to the left atrium via the lungs—is called the pulmonary circuit.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Pathway of Blood Through the Heart
This concept involves understanding the sequential flow of blood through the heart chambers and valves. Blood enters the right atrium, moves to the right ventricle, then is pumped to the lungs, returns to the left atrium, completing the circuit. Knowing each step is essential to trace the blood drop accurately.
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4:40
Alternative Pathway
Pulmonary Circulation
Pulmonary circulation refers to the movement of blood from the heart to the lungs and back. It starts at the right ventricle, where deoxygenated blood is sent to the lungs for oxygenation, and ends at the left atrium, where oxygen-rich blood returns. This circuit is crucial for gas exchange.
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3:49Pressure in the Lungs and Pleural Cavity Example 1
Heart Valves and Their Function
Heart valves ensure unidirectional blood flow through the heart chambers. The tricuspid valve controls flow from right atrium to right ventricle, and the pulmonary valve regulates flow from right ventricle to pulmonary artery. Understanding valve function helps explain how blood moves without backflow.
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7:13Systole, Diastole, Pressure, & Valves
Related Practice
Textbook Question
The activity of the heart depends on intrinsic properties of cardiac muscle and on neural factors. Thus:
a. Vagus nerve stimulation of the heart reduces heart rate
b. Sympathetic nerve stimulation of the heart decreases time available for ventricular filling
c. Sympathetic stimulation of the heart increases its force of contraction
d. All of the above
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Textbook Question
Discuss how the Frank-Starling law of the heart helps to explain the influence of venous return on stroke volume.
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Textbook Question
Name the elements of the intrinsic conduction system of the heart in order, beginning with the pacemaker
What is the important function of this conduction system?
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Textbook Question
Describe the pericardium and distinguish between the fibrous and the serous pericardia relative to histological structure and location.
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Textbook Question
As Cara worked at her dissection, she became frustrated that several of the structures she had to learn about had more than one common name. Provide another name for each of these structures:
a. Atrioventricular groove
b. Tricuspid valve
c. Bicuspid valve (give two synonyms)
d. Atrioventricular bundle
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