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DictionarySeelacunaHowship's lacuna
Howship's lacuna[′hau̇·shəps lə′kü·nə] (histology) Minute depressions in the surface of a bone undergoing resorption. Howship's lacuna
lacuna [lah-ku´nah] (L.) 1. a small pit or hollow cavity.2. a defect or gap, as in the field of vision (scotoma). adj., adj lacu´nar.absorption lacuna resorption lacuna.bone lacuna a small cavity within the bone matrix, containing an osteocyte, and from which slender canaliculi radiate and penetrate the adjacent lamellae to anastomose with the canaliculi of neighboring lacunae, thus forming a system of cavities interconnected by minute canals.cartilage lacuna any of the small cavities within the cartilage matrix, containing a chondrocyte.Howship's lacuna resorption lacuna.intervillous lacuna one of the spaces of the placenta occupied by maternal blood, into which the fetal villi project.osseous lacuna bone lacuna.lacuna pharyn´gis a depression of the pharyngeal end of the eustachian tube.resorption lacuna a pit or concavity found in bones undergoing resorption, frequently containing osteoclasts. Similar lacunae also may be found in eroding surfaces of cementum.Howship's lacunaA tiny pit in a living bone where osteoclasts are resorbing structural minerals and collagen. Synonym: resorption bay; resorption lacunaSee also: lacuna |