They are very thin-walled membranes, very poor in blood-vessels, formed by the bulged-out pleural or peritoneal covering of the lungs, through the parabronchial tubes of which they are filled with air.
pig, Pleural ganglion.
In some cases each pleural ganglion is connected with the opposite branch of the visceral commissure by anastomosis with the pallial nerve, a condition which is called dialyneury; or there may be a direct connective from the pleural ganglion to the visceral ganglion of the opposite side, which is called zygoneury.
The connexion with the pericardium of pl, Pleural ganglion.
Co, Pleural ganglion.
v, Pleural and pedal ganglion c, Eye.
p1, Pleural ganglion.
And just pl, Pleural ganglion.
The adult stage, for example, has been found in the nasal passages of sheep, goats, horses and even of man, and the larval stage in the pleural and peritoneal cavities of dogs and cats.
An important feature is the occurrence in some species (Ptychoderidae) of paired longitudinal pleural or lateral folds of the body which are mobile, and can be approximated at their free edges so as to close in the dorsal surface, embracing both the median dorsal nerve-tract and the branchial grooves with the gill-pores, so as to form a temporary peri-branchial and medullary tube, open behind where the folds cease.
Correlated with the presence of the genital pleurae there is a pair of vascular folds of the basement membrane proceeding from the dorsal wall of the gut in the postbranchial portion of the branchio-genital region, and from the dorsal angles made by the pleural folds with the body-wall in the pharyngeal region; they pass, in their most fully developed condition, to the free border of the genital pleurae.
Ptychodera ruficollis), seeming to indicate that the pleural folds have in such cases been secondarily suppressed.
VIII to XIII, The six somites of the mesosoma, each with a movable pleural spine and a pair of dorsal entopophysis or muscle-attaching ingrowths.
The body and head have the two pleural regions of each somite flattened and expanded on either side of the true gut-holding body-axis.
In a given case of anasarca due to a cause acting generally, it will be found that the liquid of the pleural cavity always contains the highest percentage of proteid, that of the peritoneal cavity comes next, that of the cerebral ventricles follows this, and the liquid of the subcutaneous areolar tissue contains the lowest.
The reason of this is apparently that the negative pressure of the pleural, and partly of the peritoneal, cavity tends to aspirate a liquid relatively thicker, so to speak, than that effused where no such extraneous mechanism is at work (James).
The tergal and pleural elements of the pygidium are generally well marked.
19, B, a) and connected in front of it by a commissure, are the representatives of the cerebral and pleural ganglia of the typical Mollusc, which are not here differentiated as they are in Gastropods.
Formerly the posterior pair of ganglia were identified as simply the osphradial ganglia, and the anterior pair as the cerebral, pleural and visceral ganglia united into a single pair.
But it has since been discovered that in the Protobranchia the cerebral ganglia and the pleural are distinct, each giving origin to its own connective which runs to the pedal ganglion.
In them the foot has a flat ventral surface used for creeping, as in Gastropods, the byssus gland is but slightly developed, the pleural ganglia are distinct, there is a relic of the pharyngeal cavity, in some forms with a pair of glandular sacs, the gonads retain their primitive connexion with the renal cavities, and the otocysts are open.
The ventral cords are the pedal, the dorso-lateral, the pleural, the former innervating the foot, the latter the mantle.
The pedal cords are connected by commissures, and the pedal and pleural of each side are similarly connected.
At the point of the collar whence the nerve-cords arise are the cerebral ganglia; from these one pair of connectives passes to a pair of pedal ganglia, and another pair of connectives to a pair of pleural ganglia.
Pedal and pleural on each side are connected by a pleuro-pedal connective Each pleural ganglion gives off a long nerve which supplies the viscera, and the two unite posteriorly below the intestine.
pl.g, Pleural ganglion.
From this pass off two pairs of cords, the pleural and pedal, in Proneomenia separate from their origin, in Neomenia united at first and diverging at a pleural ganglion.
According to Spengel, the pair of ganglia near the mouth, variously called labial or cerebral, represent the cerebral pair and pleural pair of a gastropod combined, and the parietosplanchnic pair correspond to the visceral ganglia, the commissure which connects them with the cerebro-pleural representing the visceral commissure.
Close to each cerebral ganglion is a pleural ganglion, and each is connected by a long nerve with the pedal ganglion of the same side, the two connectives of either side being united in the distal part of their course.
He was in atrial fibrillation and had a right pleural effusion and ascites.
Exposure to asbestos can also cause a benign pleural effusion.
I think they are trying to prevent pleural effusions, but I'm not sure about that.
You can also treat pleural effusion by operating to remove the pleura (a pleurectomy ). This is called a pleurectomy.
A chest radiograph revealed left sided pleural effusion with mediastinal emphysema.
Can be difficult to differentiate pleural empyema from pleural effusion in the absence of a positive Gram stain or bacterial culture.
epidural catheter is passed into the pleural cavity.
Virtually all cases of pleural mesothelioma are caused by exposure to asbestos fibers.
multiple myeloma was the suspected cause of the pleural lesions.
We should say, ' Okay, you say pleural plaques don't count.
Have you any information re surgical treatments and outcomes for pleural mesothelioma, especially extra pleural pneumonectomy please?
Chest X-ray films and computed tomographic scans disclosed left pleural effusion and diffuse pleural thickening.
Anyone who has pleural thickening can be at higher risk of asbestos related diseases.
He was found to be suffering from bilateral diffuse pleural thickening.
Not only are the pleural ganglia fused to the cerebral, but also the visceral to these (see in further illustration the condition attained by the Pulmonate Limnaeus, fig.
A wing is an outgrowth from the dorsal and pleural regions of the thoracic segment that bears it, and microscopic examination shows it to consist of a double layer of cuticularized skin, the two layers being in contact except where they are thickened and folded to form the firm tubular nervures, which serve as a supporting framework for the wing membrane, enclose air-tubes, and convey blood.
Moreover, in many forms, in which in the adult condition there is only a single pair of anterior ganglia and a single pedal connective, a pleural ganglion distinct from the cerebral has been recognized in the course of development.
Quite often, those who are diagnosed with pleural plaques do not initially recollect where they had asbestos exposure.
This fluid contains many eosinophils and can infiltrate the membrane of the lungs (pleural effusion).
Pneumothorax-A collection of air or gas in the chest or pleural cavity that causes part or all of a lung to collapse.
pe, The fused pleural and pedal nerves.
(From Gegenbaur, after Bergh.) A, Cerebral, pleural and visceral ganglia united.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.