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Osteoarthritis - causes, symptoms, diagnosis, treatment & pathology
학습 통계
CEFR 레벨
난이도
자막 (91 세그먼트)
Osteo- means “bone”, and -arth- refers to “arthron” which means joint, and -itis
means “inflammation”, so osteoarthritis is a disease involving inflammation of the
bone and joint cartilage.
It was once thought that the “itis” part of osteoarthritis was a misnomer, and that
inflammation didn’t play a role in its development, and that it was mostly a degenerative disease
resulting from simple “wear and tear”.
Nowadays, it’s thought that inflammation does indeed play an important role in the
development of osteoarthritis.
Alright, so a healthy joint consists of two bones, each with its own layer of articular
cartilage, which is a type of connective tissue that allows the two bones to glide against
each other essentially without friction.
With Osteoarthritis, we’re really talking about one particular kind of joint which is
a synovial joint.
Along with articular cartilage, another important component of synovial joints, and where they
get their name from, is the synovium, which along with the surface of the articular cartilage,
forms the inner lining of the joint space.
The synovium’s composed of loose connective tissue, blood vessels, lymphatic vessels,
and on the surface—”Type A” cells that clear cellular debris and “Type B” cells
that produce components of synovial fluid, which helps lubricate the two articular surfaces.
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