Textbook Question
The simple squamous epithelium covering the heart valves is the:
(a) Epicardium
(b) Endocardium
(c) Myocardium
(d) Endothelium
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Ch. 20 The Heart
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089
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Table of contents
- Ch. 1 An Introduction to Anatomy and Physiology26
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization30
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure36
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses16
- Ch. 18 The Endocrine System20
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation29
- Ch. 22 The Lymphatic System and Immunity31
- Ch. 23 The Respiratory System12
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes32
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance23
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Not the one you use?Change textbook
Chapter 20, Problem 5
The heart is surrounded by the:
(a) Pleural cavity
(b) Peritoneal cavity
(c) Abdominopelvic cavity
(d) Mediastinum
(e) Abdominal cavity
Verified step by step guidance1
Step 1: Understand the anatomical location of the heart within the thoracic cavity. The heart is located centrally in the chest, between the lungs.
Step 2: Identify the specific space or compartment that contains the heart. The heart is enclosed within a region called the mediastinum, which is the central compartment of the thoracic cavity.
Step 3: Differentiate the mediastinum from other cavities listed: the pleural cavity surrounds the lungs, the peritoneal cavity is within the abdomen, the abdominopelvic cavity includes the abdominal and pelvic regions, and the abdominal cavity is part of the abdominopelvic cavity.
Step 4: Recognize that the mediastinum contains the heart, thymus, parts of the esophagus and trachea, and major blood vessels, making it the correct answer for the cavity surrounding the heart.
Step 5: Conclude that the heart is surrounded by the mediastinum, which is distinct from the pleural, peritoneal, abdominopelvic, and abdominal cavities.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Mediastinum
The mediastinum is the central compartment of the thoracic cavity, located between the lungs. It contains the heart, trachea, esophagus, and major blood vessels, providing a protective space for these vital structures.
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2:51
Organization of the Thoracic Cavity
Pleural Cavity
The pleural cavity is the potential space between the two layers of pleura surrounding each lung. It contains a small amount of lubricating fluid but does not enclose the heart.
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4:01Pressure in the Lungs and Pleural Cavity Example 2
Peritoneal and Abdominopelvic Cavities
The peritoneal cavity is the space within the abdomen that houses abdominal organs, lined by the peritoneum. The abdominopelvic cavity includes both the abdominal and pelvic cavities, neither of which contain the heart.
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5:46Organization of the Abdominopelvic Cavity
Related Practice
Textbook Question
The serous membrane covering the outer surface of the heart is the:
(a) Parietal layer of the serous pericardium
(b) Endocardium
(c) Myocardium
(d) Visceral layer of the serous pericardium
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Textbook Question
The autonomic centers for cardiac function are located in:
(a) The myocardial tissue of the heart
(b) The cardiac centers of the medulla oblongata
(c) The cerebral cortex
(d) All of these structures
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Textbook Question
Identify the superficial structures in the following diagram of the heart.
a. ___
b. ___
c. ___
d. ___
e. ___
f. ___
g. ___
h. ___
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Textbook Question
Cardiac output is equal to the:
(a) Difference between the end-diastolic volume and the end-systolic volume
(b) Product of heart rate and stroke volume
(c) Difference between the stroke volume at rest and the stroke volume during exercise
(d) Stroke volume less the end-systolic volume
(e) Product of heart rate and blood pressure
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Textbook Question
The cardiac skeleton of the heart has which two of the following functions?
(a) It physically isolates the muscle fibers of the atria from those of the ventricles.
(b) It maintains the normal shape of the heart.
(c) It helps distribute the forces of cardiac contraction.
(d) It allows more rapid contraction of the ventricles.
(e) It strengthens and helps prevent overexpansion of the heart.
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