AnatomyLesson 2 of 6 in the course Joints

Fibrous Joints: Sutures, Syndesmoses, and Gomphoses

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

This lesson introduces the defining features of fibrous joints and explores sutures, the joints that connect most bones of the skull. It also explains how skull sutures change during growth and later in life.

At a fibrous joint, adjacent bones are connected directly by fibrous connective tissue. There is no joint cavity between the bones. The connective tissue may occupy a narrow gap or extend across a wider space.

All flashcards

What defines a fibrous joint?
Adjacent bones are directly connected by fibrous connective tissue, and there is no joint cavity between them.
What are fontanelles?
Broad regions of connective tissue between the skull bones of newborns and infants.
What is a skull suture?
A narrow fibrous joint that connects most skull bones.
What is a synostosis?
Fusion of adjacent bones after the connective tissue between them ossifies.
What is a gomphosis?
A fibrous joint that anchors a tooth root in a jaw socket.

Quiz questions

  1. What structure connects the parallel bones of a syndesmosis?Answer: A ligament, an interosseous membrane, or both.
  2. Which fibrous joint allows the radius to rotate during forearm movements?Answer: The interosseous membrane between the radius and ulna.
  3. How does the distal tibiofibular syndesmosis support the ankle?Answer: It helps hold the talus firmly between the tibia and fibula.
  4. Which tissues anchor a tooth root within its bony socket?Answer: Short bands of dense connective tissue called periodontal ligaments.
  5. What functional joint class describes a syndesmosis?Answer: Amphiarthrosis, which permits limited movement.

Based on Anatomy and Physiology 2e by J. Gordon Betts, Kelly A. Young, James A. Wise, Eddie Johnson, Brandon Poe, Dean H. Kruse, Oksana Korol, Jody E. Johnson, Mark Womble, Peter DeSaix (OpenStax), licensed CC BY 4.0. Adapted into a summary, flashcards and quizzes.

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