SVT 3eme
Travaux dirigés sur l'immunologie
EXERCICE 1
A la suite d'une blessure au doi...
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Biology, 10.05.2021 23:30 kenzie3497
SVT 3eme
Travaux dirigés sur l'immunologie
EXERCICE 1
A la suite d'une blessure au doigt (due par exemple à la piqûre d'un clou), on observe les faits
suivants:
- La région entourant la plaie rougit et devient douloureuse.
- La guérison peut survenir après quelques jours mais parfois il se forme un abcès contenant du
pus.
L'observation au microscope d'une goutte de pus montre de très nombreuses bactéries et des
polynucléaires (globules blancs)
piqûre, réaction inflammatoire
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