resorption lacuna

lacuna /la·cu·na/ (lah-ku´nah) pl. lacu´nae   [L.]

1. a small pit or hollow cavity.

2. a defect or gap, as in the field of vision (scotoma).lacu´nar

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absorption lacuna  resorption l.

bone lacuna  a small cavity within the bone matrix, containing an osteocyte; from it 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 l.

intervillous lacuna  one of the blood spaces of the placenta in which the fetal villi are found.

lateral lacunae  venous meshworks within the dura mater on either side of the superior sagittal sinus.

osseous lacuna  bone l.

lacuna pharyn´gis  a depression at the pharyngeal end of the eustachian tube.

resorption lacuna  a pit or groove in developing bone that is undergoing resorption; frequently found to contain osteoclasts.

trophoblastic lacuna  intervillous l.

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resorption lacuna

n.

See Howship's lacuna.

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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.

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resorption

1. the lysis and assimilation of a substance, as of bone or fetus.

2. reabsorption.

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resorption-formation sequence

while bones are being formed for the first time the sequence is formation followed by resorption and modeling; in remodeling of an existing bone resorption occurs first and is then followed by bone formation.

resorption lacuna

concavities in bone created by osteoclasts.

resorption space

a continuous series of resoption lacunae.