Textbook Question
Collections of lymphoid tissue (MALT) that guard mucosal surfaces include all of the following except:
a. Appendix follicles
b. The tonsils
c. Peyer's patches
d. The thymus
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Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues
Marieb, Hoehn7th EditionHuman Anatomy & PhysiologyISBN: 9780805359091
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Table of contents
- Ch. 1 The Human Body: An Orientation24
- Ch. 2 Chemistry Comes Alive25
- Ch. 3 Cells: The Living Units24
- Ch. 4 Tissue: The Living Fabric19
- Ch. 5 The Integumentary System10
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton11
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System26
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue23
- Ch. 12 The Central Nervous System26
- Ch. 13 The Peripheral Nervous System and Reflex Activity28
- Ch. 14 The Autonomic Nervous System18
- Ch. 16 The Endocrine System26
- Ch. 17 Blood27
- Ch. 18 The Cardiovascular System: The Heart22
- 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 Defenses29
- Ch. 22 The Respiratory System20
- Ch. 23 The Digestive System30
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System25
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System23
Marieb, Hoehn7th EditionHuman Anatomy & PhysiologyISBN: 9780805359091Not the one you use?Change textbook
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Marieb, Hoehn 7th EditionCh. 20 The Lymphatic System and Lymphoid Organs and TissuesProblem 12
Marieb, Hoehn 7th EditionCh. 20 The Lymphatic System and Lymphoid Organs and TissuesProblem 12Chapter 19, Problem 12
A friend tells you that she has tender, swollen 'glands' along the left side of the front of her neck. You notice that she has a bandage on her left cheek that is not fully hiding a large infected cut there. Exactly what are her swollen 'glands,' and how did they become swollen?
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Identify the 'glands' mentioned as swollen along the left side of the front of the neck. In anatomy, these are most likely the lymph nodes, which are part of the lymphatic system and act as filters for harmful substances.
Understand the role of lymph nodes: they trap bacteria, viruses, and other foreign particles, and contain immune cells that help fight infection.
Recognize that the infected cut on the left cheek is a source of infection. The lymphatic vessels drain fluid from the cheek area to the nearby lymph nodes in the neck.
Explain that the lymph nodes become swollen and tender because they are actively working to filter out the infection from the cheek wound, causing inflammation and enlargement.
Summarize that the swollen 'glands' are actually lymph nodes responding to the infection in the cheek by increasing immune activity, which leads to their tenderness and swelling.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Lymph Nodes and Their Function
Lymph nodes are small, bean-shaped structures that are part of the lymphatic system. They filter lymph fluid and trap pathogens like bacteria and viruses. When an infection occurs nearby, lymph nodes can become swollen and tender as they produce immune cells to fight the infection.
Recommended video:
5:05
Introduction to Lymph Nodes
Lymphatic Drainage and Regional Infection
Lymphatic vessels drain fluid from tissues to nearby lymph nodes. Infections in a specific area, such as the cheek, cause the lymph nodes that drain that region—like those along the front of the neck—to become inflamed. This localized swelling indicates the immune system's response to the infection.
Recommended video:
3:32Introduction to the Lymphatic System Example 2
Signs of Infection and Immune Response
Swollen, tender lymph nodes often signal an active immune response to infection. The presence of a large infected cut on the cheek suggests bacteria entered the tissue, triggering inflammation and immune cell activation in the nearby lymph nodes, causing them to enlarge and become painful.
Recommended video:
6:59Primary and Secondary Response of Adaptive Immunity
Related Practice
Textbook Question
Compare the structure and functions of a lymph node to those of the spleen.
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Textbook Question
Which anatomical characteristic ensures that the flow of lymph through a lymph node is slow?
Why is this desirable?
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Textbook Question
There are no lymphatic arteries. Why isn't this a problem?
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Textbook Question
Compare and contrast blood, interstitial fluid, and lymph.
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Textbook Question
Mrs. Jackson, a 59-year-old woman, has undergone a left radical mastectomy (removal of the left breast and left axillary lymph nodes and vessels). Her left arm is severely swollen and painful, and she is unable to raise it to more than shoulder height.
Explain her signs and symptoms.
Can she expect to have relief from these symptoms in time? How so?
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