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Histology Term 1 > Joints > Flashcards

Joints Flashcards

1
Q

What are the 3 main classifications of joints?

A
  1. Synarthroses
  2. Amphiarthroses
  3. Diarthroses
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2
Q

What are synarthroses joints?

A

Joints that have very limited movement

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3
Q

What are the three subtypes of synarthroses joints?

A
  1. Synostosis
  2. Synchondroses
  3. Syndesmosis
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4
Q

What are synostosis joints? Give example.

A

-Subtype of Synarthroses joints
-Connected by bone
ex=skull

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5
Q

What are synchondroses joints? give example.

A

-Subtype of Synarthroses
-connected by hyaline cartilage with very little movement
ex= 1st rib to sternum

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6
Q

What are syndesmosis joints? give example

A

-subtype of synarthroses
-connected by dense connective tissue
ex= Pubic symphesis

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7
Q

What are Amphiarthroses joints? Give example

A

-Joints that permit slight movement

ex= intervertebral disc

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8
Q

What are Diarthroses joints? Give example

A

-Joints that permit relatively free movement between connected bones
ex=long and short bones

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9
Q

What are the two components that make up an Amphiarthrosis joint?

A
  1. fibrocartilage

2. a viscous gel-like substance

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10
Q

What is the annulus fibrosus?

A

A ring of fibrocartilage found in intervertebral discs

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11
Q

What is the Nucleus Pulposus?

A

A viscous gel-like substance found inside the annulus fibrosus of intervertebral discs

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12
Q

What is contained within the articular cavity of Diarthroses joints?

A

Synovial fluid

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13
Q

Is there perichondrium on articular cartilage?

A

NO

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14
Q

What is the major component of synovial fluid?

A

Hyaluronic acid

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15
Q

What produces synovial fluid?

A

the synovial membrane

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16
Q

What are the components of a Diarthroses joint?

A
  • Ligaments
  • Articular Capsule
  • Synovial membrane
  • Synovial fluid
  • Articular cartilage
17
Q

How is the structure of Articular cartilage different from normal hyaline cartilage?

A
  • No perichondrium
  • “Gothic Arches” = collagen fibers are arranged in a pattern, vertical parallel fibers with horizontal parallel fibers at the articular surface.
18
Q

But articular cartilage has no perichondrium!! How does it get nutrients??

A
  • High hyaluronic acid content
  • As joints are compressed, water is squeezed out of joints
  • When pressure is relieved, water flows back in with Oxygen and nutrients
19
Q

How does the synovial membrane produce synovial fluid without glands?

A
  • Leaky capilaries
  • no basal lamina = water can pass through
  • Synovial layer produces GAG’s and proteoglycans that absorb the water from the leaky capillaries
20
Q

How does the synovial membrane control the sterility of the synovial fluid?

A

With Macrophage-like cells

Histology Term 1 (15 decks)

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