Joints and Synovial Fluid and Cartilage Flashcards
what are the different types of joints?
- Fibrous - lots of collagen fibres, densely packed
- Cartilaginous - not that mobile but more mobile than fibrous
- Synovial - the most mobile ones – often these are the joints found in limbs
what are examples of fibrous joints?
not much movement
what are the 2 types of Cartilaginous joints and what makes them up?
- Primary c. joint: only hyaline cartilage
- Secondary c. joint: hyaline & fibrocartilage
what is a Synchondrosis?
Primary cartilaginous joint
only hyaline cartilage
what is a Symphysis?
Secondary cartilaginous joint
hyaline and fibrocartilage
what are common features of a synovial joint?
Fibrous capsule around the synovial joint
Lined on inside with synovial membrane – in green
Articular cartilage on bone surface
In joint space you have synovial fluid
what may some synovial joints contain?
Articular discs
Ligaments - can be in or out the joint capsule
Bursae - fluid filled pillows, variable around joints
name this synovial joint
Plane
name this synovial joint
Hinge
name this synovial joint
Pivot
name this synovial joint
Condylar (ellipsoid)
name this synovial joint
Saddle
name this synovial joint
Ball and socket
what are factors that play a role in joint stability?
- Shape of articulating surfaces
- Capsule & ligaments
- Muscles
e.g. Shoulder is a shallow socket so very mobile but also unstable so can dislocate easily
what cartilage is present in synovial joints?
Knee joint diagram, ooking from superior - lateral right and medial on left
Darker blue is articular cartilage – hyaline cartilage
Meniscus made of fibrocartilage
Wavy fibres in fibrocartilage is collagen, also get some collagen in the hyaline cartilage but cant see them in this photo
Fibrocartilage is stronger due to densely packed collagen