Forelimb Flashcards
Name the 3 main classification of joints
Synovial
Cartilaginous
Fibrous
Describe a fibrous joint
They are mostly found in the skull- sutures
Allow growth of the skull in young animals through extension of individual bones at their margins
Narrow strip of tissue outlines and unites the margins of the bone
Eventually they are eliminated when ossification extends across the membrane after growth
Allows little or no movement
Describe the syndemoses type of fibrous joint
Found when two bones face each other joined by connective tissue ligaments
Found between the shafts of the radius and the ulna
What is a gomphosis joint
A fibrous mobile peg and socket joint
E.g teeth
Describe a cartilaginous joint
Properly known as a syndondroses
Are joints between the epiphysis and diaphysis of young long bones and joints at the base of the skull
•most are temporary
Describe a permanent syndondroses
A type of cartilaginous joint found between the skull and the hyoid apparatus
Much movement in some species
What is a symphysis
A series of tissues found between articulating bones
Describe a synovial joint
Articular bones separated by a fluid filled cavity, the joint cavity
Additional tissue bands (ligaments)
•used to position the bone and restrict movement to required directions and extents
•some are thickenings of the joint capsule
What role does the periosteum play in the synovial joint
It is a continuation of the fibrous capsule
Provides strength for the synovial membrane externally
What role does the articular surface play in the synovial joint
The articular surface is covered in hyaline cartilage
It is used to absorb shock and reduce friction during movement
Describe the role of the sleeve of delicate CT attaching around the periphery of the articular surface known as the SYNOVIAL MEMBRANE
The synovial membrane makes synovial fluid
For lubrication
What is the purpose of the fibrous capsule
It strengthens the synovial membrane externally
What is the purpose of articular disks
Divide the joint into two
E.g temperomandibular joint
What is the function of the menisci
Provide congruence for incompatible joint surfaces
Resolve complex movements into simpler ones
To provide some shock absorption
