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What is the function of the intervertebral discs?
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Ch. 7 The Skeleton
Marieb, Hoehn7th EditionHuman Anatomy & PhysiologyISBN: 9780805359091
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TOC.tableOfContents
- 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: 9780805359091Non è quello che usi tu?Cambia libro di testo
Capitolo 7, Problema 8
Distinguish between the anulus fibrosus and nucleus pulposus regions of a disc. Which provides durability and strength? Which provides resilience? Which part is involved in a 'slipped' disc?
Guida verificata passo dopo passo1
Step 1: Define the two main regions of an intervertebral disc: the anulus fibrosus and the nucleus pulposus. The anulus fibrosus is the tough, outer ring composed of several layers of fibrocartilage, while the nucleus pulposus is the soft, gel-like center of the disc.
Step 2: Explain the functional roles of each region. The anulus fibrosus provides durability and strength to the disc because its layered fibrocartilage structure resists tensile forces and prevents the disc from rupturing under pressure.
Step 3: Describe the role of the nucleus pulposus. This gel-like core provides resilience and acts as a shock absorber by distributing compressive forces evenly across the disc during movement and weight-bearing activities.
Step 4: Clarify which part is involved in a 'slipped' or herniated disc. A 'slipped' disc occurs when the nucleus pulposus protrudes through a tear or weakness in the anulus fibrosus, potentially compressing nearby nerves and causing pain.
Step 5: Summarize the distinctions: the anulus fibrosus provides strength and durability, the nucleus pulposus provides resilience and shock absorption, and the herniation involves the nucleus pulposus escaping through the anulus fibrosus.
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Anulus Fibrosus
The anulus fibrosus is the tough, outer layer of the intervertebral disc composed of concentric rings of collagen fibers. It provides durability and strength to the disc by resisting tensile forces and maintaining structural integrity under pressure.
Nucleus Pulposus
The nucleus pulposus is the gel-like, inner core of the intervertebral disc rich in water and proteoglycans. It provides resilience by absorbing compressive forces and allowing the disc to act as a shock absorber between vertebrae.
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Percorso guidato
06:32
Nucleus
Slipped Disc (Herniated Disc)
A slipped or herniated disc occurs when the nucleus pulposus protrudes through a tear in the anulus fibrosus. This displacement can compress nearby nerves, causing pain and neurological symptoms.
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6:01Structure of the Sarcomere: Bands, Zones, Discs & Lines
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