la lymphe 11/09/20141elisabeth chaniaud. introduction 11/09/20142elisabeth chaniaud
TRANSCRIPT
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LA LYMPHE
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Introduction
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1- Formation de la lymphe
1-1 Composition de la lymphe interstitielle
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1- Formation de la lymphe
1-2 Formation de la lymphe
1-2.1 Les échanges des gaz respiratoires et des nutriments
Lois de la dialyse
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Capillaires à perméabilité différente
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1- Formation de la lymphe
1-2 Formation de la lymphe
1-2.1 Les échanges liquidiensLois de l’osmose ou
Lois de Starling
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Différentes pressions mises en jeu
• La pression hydrostatique du sang PHs artérielle = +35mmHg PHs veineuse = +16mmHg
• La pression hydrostatique du liquide interstitiel PHli = 0mmHg
• La pression oncotiquePO = 26 mmHg
• La pression osmotique du liquide interstitiel Posli = 1mmHg
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Pression nette de filtration:
PNF = (PHs + Posli) - (PHli + PO)
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Soit à l’extrémité artérielle :PNF = (35 + 1) – (0 + 26) = + 10 mmHg
FILTRATION
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Soit à l’extrémité veineuse :PNF = (16 + 1) – (0 + 26) = -9 mmHg
REABSORPTION
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2- La circulation lymphatique
2-1 Les différents vaisseaux lymphatiques
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Les capillaires lymphatiques
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Les vaisseaux de transport
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2- La circulation lymphatique
2-2 Le réseau lymphatique
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2- La circulation lymphatique
2-3 Les ganglions ou nœuds lymphatiques
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3- Les rôles de la lymphe
3-1 La lymphe interstitielle3-2 La lymphe canalisée
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conclusion
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