Textbook Question
The structural framework of lymphoid organs is:
a. Areolar connective tissue
b. Hematopoietic tissue
c. Reticular tissue
d. Adipose tissue
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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 2
Marieb, Hoehn 7th EditionCh. 20 The Lymphatic System and Lymphoid Organs and TissuesProblem 2Chapter 19, Problem 2
The sac that often forms the initial portion of the thoracic duct is:
a. Lacteal
b. Right lymphatic duct
c. Cisterna chyli
d. Lymph sac
Verified step by step guidance1
Step 1: Understand the anatomy of the thoracic duct, which is the main lymphatic vessel that drains lymph from most of the body into the venous system.
Step 2: Recognize that the thoracic duct begins in the abdomen and ascends through the thorax to empty into the venous circulation near the junction of the left subclavian and internal jugular veins.
Step 3: Identify the structure that forms the initial dilated portion of the thoracic duct, which acts as a sac collecting lymph from the lower limbs and intestinal trunk.
Step 4: Recall that this initial sac is called the "cisterna chyli," a key anatomical landmark in the lymphatic system.
Step 5: Conclude that among the given options, the correct answer is the cisterna chyli, as it is the sac that often forms the initial portion of the thoracic duct.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Thoracic Duct
The thoracic duct is the largest lymphatic vessel in the body, responsible for transporting lymph from most of the body into the venous system. It begins in the abdomen and ascends through the thorax to drain into the left subclavian vein.
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Guided course
5:03
Thoracic Cage
Cisterna Chyli
The cisterna chyli is a dilated sac at the lower end of the thoracic duct, located in the abdomen. It collects lymph from the intestinal and lumbar lymphatic trunks before the lymph is transported upward through the thoracic duct.
Recommended video:
3:27Lymphatic Ducts
Lymphatic System Anatomy
Understanding the structure and function of lymphatic vessels, including lacteals, lymph sacs, and ducts, is essential. Lacteals absorb fats in the intestines, lymph sacs are embryonic structures, and the right lymphatic duct drains lymph from the right upper body.
Recommended video:
3:57Functions of the Lymphatic System
Related Practice
Textbook Question
Entry of lymph into the lymphatic capillaries is promoted by which of the following?
a. One-way minivalves formed by overlapping endothelial cells
b. The respiratory pump
c. The skeletal muscle pump
d. Greater fluid pressure in the interstitial space
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Textbook Question
Lymphatic vessels:
a. Serve as sites for immune surveillance
b. Filter lymph
c. Transport leaked plasma proteins and fluids to the cardiovascular system
d. Are represented by vessels that resemble arteries, capillaries, and veins
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Textbook Question
Lymph nodes are densely clustered in all of the following body areas except:
a. Brain
b. The axillae
c. The groin
d. The cervical region
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