Questions and Answers
What are joints also called?
What are the functions of joints?
Joints bind parts of the skeletal system, facilitate bone growth, allow changes in shape during childbirth, and enable movement in response to muscle contractions.
What are the three general groups of joints?
fibrous, cartilaginous, and synovial.
How can joints be grouped?
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What are immovable joints called?
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What are slightly movable joints called?
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What are freely movable joints called?
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Why are fibrous joints so named?
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What are the three types of fibrous joints?
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What binds bones in syndesmosis?
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Give an example of a syndesmosis.
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What kind of movement does syndesmosis permit?
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Sutures are only between which bones?
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What is a sutural ligament?
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How do fontanels assist the skull?
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Give an example of a suture.
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What kind of movements do sutures permit?
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What is a gomphosis?
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What is a periodontal ligament?
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Give an example of a gomphosis.
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Bones of cartilaginous joints are joined by?
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What are the two types of cartilaginous joints?
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What occurs in a synchondrosis?
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What are many synchondroses?
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What are two examples of synchondroses?
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What kind of movement do synchondroses permit?
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What happens in a symphysis?
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Give two examples of symphyses.
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What kind of movement do symphyses permit?
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What type of joints are most joints?
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What kind of movement do synovial joints permit?
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What do synovial joints consist of?
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Study Notes
Overview of Joints
- Joints, or articulations, serve as functional connections between bones.
- They play a vital role in binding the skeletal system, facilitating bone growth, enabling shape changes during childbirth, and allowing movement through muscle contractions.
Types of Joints
- Joints can be categorized into three main groups:
- Fibrous
- Cartilaginous
- Synovial
Movement Classification
- Joints are classified by their movement capabilities:
- Immovable joints (synarthrotic)
- Slightly movable joints (amphiarthrotic)
- Freely movable joints (diarthrotic)
Fibrous Joints
- Named for the dense connective tissue with numerous collagenous fibers.
- Three types include:
- Syndesmosis
- Suture
- Gomphosis
Syndesmosis
- Bones are connected by either a sheet of fibrous connective tissue or a bundle of fibrous tissue (interosseous membrane/ligament).
- Example: Tibia and fibula
- Permits slight movement (amphiarthrotic).
Sutures
- Found only between flat bones of the skull.
- Connected by a thin layer of dense connective tissue (sutural ligament).
- Example: Parietal suture
- Are immovable (synarthrotic).
- Fontanels in skull allow for slight shape change during childbirth.
Gomphosis
- Characterized by a conical bony process fitting into a bony socket.
- Example: Tooth in socket.
- Supported by a periodontal ligament, which attaches the tooth to the jaw.
Cartilaginous Joints
- Bones in these joints are united by hyaline cartilage or fibrocartilage.
- Two primary types are:
- Synchondroses
- Symphyses
Synchondrosis
- Bones united by bands of hyaline cartilage.
- Examples include epiphyseal plates and the joint between the first rib and manubrium.
- Generally temporary structures that disappear with growth and do not allow movement (synarthrotic).
Symphysis
- Articular surfaces covered with hyaline cartilage attached to a pad of fibrocartilage.
- Examples include the symphysis pubis and intervertebral joints.
- Allow slight movements (amphiarthrotic).
Synovial Joints
- Represent the majority of joints in the body.
- Allow free movement (diarthrotic).
- Consist of:
- Articular cartilage
- Joint capsule
- Synovial membrane
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Description
This quiz covers the essential aspects of joints in the human skeletal system, including types, classifications, and their functions. Learn about fibrous, cartilaginous, and synovial joints, as well as their movement capabilities. Enhance your understanding of how joints facilitate movement and provide structure to the body.
