Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

8. Joints

Structural Class: Cartilaginous Joints

Anatomy & Physiology

8. Joints

Structural Class: Cartilaginous Joints

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Problem L2.1b

Textbook Question

Explain how the structure of each of the following joint types follows its function.
Cartilaginous joint

Verified step by step guidance

Understand the definition of a cartilaginous joint: These joints are connected entirely by cartilage (either hyaline cartilage or fibrocartilage) and allow limited movement, making them amphiarthrotic joints.

Examine the structure of cartilaginous joints: They are composed of cartilage that acts as a cushion and provides flexibility. The two main types are synchondroses (hyaline cartilage) and symphyses (fibrocartilage).

Relate the structure to the function: The cartilage in these joints provides both strength and flexibility, allowing slight movement while maintaining stability. For example, the intervertebral discs (a type of symphysis) absorb shock and allow limited movement between vertebrae.

Consider examples of cartilaginous joints: Synchondroses, such as the epiphyseal plates in growing bones, allow for bone growth while maintaining a connection. Symphyses, such as the pubic symphysis, provide slight movement to accommodate changes during activities like childbirth.

Summarize the relationship between structure and function: The cartilaginous composition of these joints ensures they can withstand pressure and provide limited movement, which is essential for their roles in the body, such as shock absorption and stability in areas like the spine and pelvis.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Cartilaginous Joint Structure

Cartilaginous joints are characterized by the presence of cartilage connecting the bones. This structure allows for limited movement, providing stability while also absorbing shock. The two main types are synchondroses, which are united by hyaline cartilage, and symphyses, which are joined by fibrocartilage, each serving specific functional roles in the body.

Function of Cartilaginous Joints

The primary function of cartilaginous joints is to provide flexibility and support while allowing for slight movement. This is crucial in areas such as the spine, where intervertebral discs (a type of symphysis) enable limited motion and absorb impact, thus protecting the vertebrae during activities like bending and twisting.

Examples of Cartilaginous Joints

Common examples of cartilaginous joints include the pubic symphysis, which connects the left and right pubic bones, and the costal cartilages that attach the ribs to the sternum. These joints illustrate how their structure—composed of cartilage—facilitates their function of providing both stability and a degree of movement necessary for various bodily activities.

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Related Practice

Multiple Choice

Which of the following describes a cartilaginous joint?

What is/are the function(s) of synovial fluid?

The articulating ends of bones of synovial joints are covered in______. The remaining internal surfaces of the joint are lined by the_____, which produces synovial fluid. The entire joint is encased by the_____, which is composed of dense, irregular collagenous connective tissue.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

Cartilaginous joints are synarthroses.

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Textbook Question

Which factors contribute to the stability of the hip joint?

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