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B1 Intermédiaire Anglais 7:14 Educational

Osteoarthritis - causes, symptoms, diagnosis, treatment & pathology

Osmosis from Elsevier · 1,545,876 vues · Ajouté il y a 3 semaines

Statistiques d apprentissage

B1

Niveau CECRL

5/10

Difficulté

Sous-titres (91 segments)

00:04

Osteo- means “bone”, and -arth- refers to “arthron” which means joint, and -itis

00:10

means “inflammation”, so osteoarthritis is a disease involving inflammation of the

00:15

bone and joint cartilage.

00:17

It was once thought that the “itis” part of osteoarthritis was a misnomer, and that

00:21

inflammation didn’t play a role in its development, and that it was mostly a degenerative disease

00:26

resulting from simple “wear and tear”.

00:29

Nowadays, it’s thought that inflammation does indeed play an important role in the

00:33

development of osteoarthritis.

00:35

Alright, so a healthy joint consists of two bones, each with its own layer of articular

00:40

cartilage, which is a type of connective tissue that allows the two bones to glide against

00:45

each other essentially without friction.

00:48

With Osteoarthritis, we’re really talking about one particular kind of joint which is

00:52

a synovial joint.

00:55

Along with articular cartilage, another important component of synovial joints, and where they

00:59

get their name from, is the synovium, which along with the surface of the articular cartilage,

01:04

forms the inner lining of the joint space.

01:08

The synovium’s composed of loose connective tissue, blood vessels, lymphatic vessels,

01:12

and on the surface—”Type A” cells that clear cellular debris and “Type B” cells

01:17

that produce components of synovial fluid, which helps lubricate the two articular surfaces.

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