choroid plexus
US /ˈkɔrɔɪd ˈplɛksəs/
UK /ˈkɔrɔɪd ˈplɛksəs/
1.
a network of blood vessels and cells in the ventricles of the brain that produces cerebrospinal fluid
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The choroid plexus is essential for the production of cerebrospinal fluid.
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Tumors can sometimes develop in the choroid plexus.