alveolus


Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to alveolus: respiratory system, alveoli

alveolus

 [al-ve´o-lus] (pl. alve´oli) (L.)
a little hollow, as the socket of a tooth, a follicle of an acinous gland, or a pulmonary alveolus. adj., adj alve´olar.
dental alveoli the cavities or sockets of either jaw, in which the roots of the teeth are embedded.
pulmonary alveoli small outpouchings along the walls of the alveolar sacs and alveolar ducts; through them, gas exchange takes place between alveolar gas and pulmonary capillary blood.

al·ve·o·lus

, gen. and pl.

al·ve·o·li

(al-vē'ō-lŭs, -ō-lī), Avoid the mispronunciation alveo'lus. A small cell, cavity, or socket.
1. Synonym(s): pulmonary alveolus
2. One of the terminal secretory portions of an alveolar or racemose gland.
3. One of the honeycomb pits in the wall of the stomach.
4. Synonym(s): tooth socket
[L. dim. of alveus, trough, hollow sac, cavity]

alveolus

(ăl-vē′ə-ləs)
n. pl. alveo·li (-lī′)
1. A small angular cavity or pit, such as a honeycomb cell.
2. A tooth socket in the jawbone.
3. A tiny, thin-walled, capillary-rich sac in the lungs where the exchange of oxygen and carbon dioxide takes place. Also called air sac.

alveolus

A hollow cavity that is an outpouching of the respiratory bronchioles and the alveolar ducts; there are an estimated 150 million alveoli, which are the primary site of gas exchange between the blood and environment, covering a surface area of 75m2. Alveoli are lined by type-1 (squamous) alveolar cells, type-2 (great) alveolar cells, the latter of which secrete surfactant and macrophages.

al·ve·o·lus

(al-vē'ō-lŭs, -lī) [TA]
1. Synonym(s): pulmonary alveoli.
2. One of the terminal secretory portions of an alveolar or racemose gland.
3. One of the honeycomb pits in the wall of the stomach.
4. Synonym(s): tooth socket.
[L. dim. of alveus, trough, hollow sac, cavity]

alveolus

(al-ve'o-lus ) (al-ve'o-li?, -le?) plural.alveoli [L. alveolus, small hollow, cavity]
1. A small hollow.
2. The bony socket of a tooth.
Enlarge picture
ALVEOLUS OF LUNGS
3. An air sac of the lungs. See: illustration
4. Any of the honeycombed depressions of the gastric mucous membrane.
5. A follicle of a racemose gland.

alveoli of the breast

Glandular structures arranged in clusters throughout the breast and the site of milk synthesis.

alveolus dentalis

A tooth socket.

pulmonary alveolus

Any of the terminal epithelial sacs of an alveolar duct where gases are exchanged in respiration. It is informally called an “air sac.” Synonym: alveolar sac

alveoli pulmonis

Pulmonary alveoli.

alveolus

1. One of the many million tiny, thin-walled, air sacs in the lungs.
2. A tooth socket in the jaw bone.
3. Any small cavity or sac.

alveolus

(pl. alveoli)
  1. a small air-filled sac which occurs in large numbers in the LUNGS of vertebrates and whose function is to increase surface area for gaseous exchange (see AERIAL RESPIRATION).
  2. groups of secretory cells found at the internal ends of ducts of mammary and other glands.
  3. an inflated area of the follicle which surrounds the depressions from which cilia (see CILIUM arise in some ciliates, e.g. Paramecium.
  4. a tooth cavity in the jaw bone.

Alveolus (plural alveoli)

The terminal air sacs of the lungs where gas exchange occurs.
Mentioned in: Surfactant

al·ve·o·lus

(al-vē'ō-lŭs, -lī) [TA]
1. Synonym(s): tooth socket.
2. A small cell, cavity, or socket.
[L. dim. of alveus, trough, hollow sac, cavity]
References in periodicals archive ?
Nasoalveolar molding and gingivoperiosteoplasty versus alveolar bone graft: an outcome analysis of costs in the treatment of unilateral cleft alveolus. Cleft Palate Craniofac J.
Furthermore, this study suggests that SCCs of retromolar trigone, maxillary alveolus and mandibular alveolus are positively correlated with smoking and tobacco use (in any other form) and the correlation is statistically significant.
A rare case of lateral proboscis with clefts of the lip, alveolus, and primary and secondary palates treated by surgical excision and repair of the cleft lip is presented.
Debridement of soft tissue remnants from the alveolus was accomplished with a Lucas curette.
However, Stenorhynchosaurus does not share the reduced distal-most alveolus in the posterior of the premaxilla [132.1] seen in a range of taxa including 'Pliosaurus' andrewsi, Liopleurodon ferox and Pliosaurus brachyspondylus (Tarlo, 1960), but not present in Megacephalosaurus eulerti (Schumacher, et al., 2013) or Brachauchenius lucasi Williston, S.W.
In this study, three patients were found to be HIV positive; all of them had plasmablastic lymphoma (two of oral tongue and one of alveolus).
The number of lamellar bodyin alveolar space and alveolus type II cell endochylema reduced, with some demonstrating vacuolization (Figure 2(b)).
Offering a pleasing esthetic appearance in a patient with cleft lip and alveolus is one of the toughest job in dental practice.
They absorb freshly inhaled oxygen into the bloodstream via tiny capillaries near the wall of the alveolus and release the cellular respiration waste product, carbon dioxide, into the atmosphere during exhalation.
Esophageal pressure measurement, were it very simple to record and entirely representative of average pleural pressure, which currently, it isn't, would not allow calculation of the actual pressure applies across the alveolus. (For that, we would need interstitial pressure, which is almost certain to vary from point to point within the heterogeneously diseased lung.) Even then, the tensions at the junctions of closed and open alveoli would be underestimated, and other damaging forces (such as tidal opening and closure) could not be tracked.
KL-6 is expressed on the surface of type II alveolar epithelial cells which consist of the walls of the alveolus (interstitium).