| dense body |
1. any of the small regions of increased density in the sarcoplasm of skeletal muscles to which myofilaments seem to attach; cf. attachment plaques, under plaque. 2. an electron-dense granule occurring in blood platelets that stores and secretes adenosine nucleotides and serotonin. Called also bull's eye b. or granule, dense granule, and platelet dense b.
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