Anatomy Chapter 9 Flashcards

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Questions and Answers

List the three structural categories of joints and briefly describe the criteria used for structural classification of joints.

The structural types of joints include fibrous joints, cartilaginous joints, and synovial joints. Joints can be classified structurally based on the presence or absence of a synovial cavity and the type of connective tissue that binds the bones together.

Which type(s) of joint(s) lack(s) a joint cavity and is(are) held together by a fibrous connective tissue?

Synovial joints

Cartilaginous joints

Fibrous joints (correct)

Which type(s) of joint(s) lack(s) a synovial cavity?

Cartilaginous joints (correct)

Fibrous joints (correct)

Synovial joints

List the three functional classifications of joints, and briefly describe the basis for the functional classification of joints.

The three functional classifications are synarthroses (totally immovable), amphiarthroses (slight movement), and diarthroses (freely movable). Signup and view all the answers

Which functional class(es) of joint(s) allow(s) movement?

Diarthrosis Signup and view all the answers

A suture is structurally classified as?

Fibrous Signup and view all the answers

A suture is functionally classified as?

Synarthrosis Signup and view all the answers

The epiphyseal plate in a growing long bone is an example of?

Synchondrosis Signup and view all the answers

Which characteristic(s) describes all synovial joints? Select all that apply.

Are freely moveable Signup and view all the answers

What unique characteristics would a person who is 'double-jointed' possess?

Double-jointed people have greater flexibility in their articular capsules and ligaments, resulting in an increased range of motion. Signup and view all the answers

Briefly describe the functions of synovial fluid.

Synovial fluid reduces friction, absorbs shock, and supplies oxygen and nutrients to chondrocytes while removing waste. Signup and view all the answers

Briefly describe what is happening when a person 'cracks their knuckles'.

When the synovial cavity expands, a partial vacuum forms, drawing gases from blood, which then burst, producing a cracking sound. Signup and view all the answers

Which statement describes the fibular and tibial collateral ligaments? Select all that apply.

The ligaments are extracapsular ligaments. Signup and view all the answers

Which statement describes the function of a meniscus?

It helps absorb shock and distributes weight. Signup and view all the answers

Gliding occurs between?

Flat bones or slightly curved bones. Signup and view all the answers

Study Notes

Structural Categories of Joints

Three structural types: fibrous joints, cartilaginous joints, synovial joints.
Classification criteria: presence/absence of synovial cavity and type of connective tissue binding the bones.

Joints Lacking a Joint Cavity

Fibrous joints lack a joint cavity and are held together by fibrous connective tissue.

Joints Without a Synovial Cavity

Both fibrous joints and cartilaginous joints lack a synovial cavity.

Functional Classifications of Joints

Three functional categories based on movement:
- Synarthroses: immovable joints.
- Amphiarthroses: slightly movable joints.
- Diarthroses: freely movable joints.

Movement Allowance in Functional Classes

Amphiarthrosis and diarthrosis classes allow joint movement.

Suture Classification

A suture is structurally classified as fibrous in adults.
Functionally classified as synarthrosis in adults.

Epiphyseal Plate Classification

The epiphyseal plate in growing long bones is classified as a synchondrosis.

Characteristics of Synovial Joints

All synovial joints contain a joint cavity, are freely movable, and articulating bones are covered with hyaline cartilage.

"Double-Jointed" Characteristics

"Double-jointed" individuals have increased flexibility in articular capsules and ligaments, leading to greater range of motion but less joint stability.

Functions of Synovial Fluid

Reduces friction, absorbs shock, supplies oxygen and nutrients, and removes carbon dioxide and metabolic wastes from articular cartilage chondrocytes.

Knuckle Cracking Mechanism

Cracking knuckles involves expansion of the synovial cavity, decreasing pressure to form and burst gas bubbles in the fluid, creating the characteristic popping sound.

Fibular and Tibial Collateral Ligaments

Composed of dense regular connective tissue and are extracapsular ligaments, associated with the knee joint, providing stability to the joint.

Function of a Meniscus

Located in the knee, composed of fibrocartilage, it helps absorb shock and distribute weight effectively in the joint.

Gliding Joint Movements

Gliding occurs between flat bones or slightly curved bones, allowing for slight movement in multiple directions.

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Description

Test your knowledge of the structural types of joints with these flashcards from Anatomy Chapter 9. Learn about the three categories of joints, the criteria for their classification, and how they differ in structure. A great way to reinforce your understanding of joint anatomy!