One or more contractile vacuoles may protrude from the ectoplasm.
At a later stage all the vacuoles unite together and form a cavity filled with a brown granular mass.
The cells forming it fuse together, their nuclei disappear, and numerous vacuoles containing concretions arise in them.
Vacuoles are seen in cells; and there is an opinion that these may be a special kind of plastid: some vacuoles pulsate.
The central capsule is filled up by clear vacuoles and contains on its cortical zone a layer of large oil-globules.
The central capsule is filled up by clear vacuoles and exhibits in the upper half the ellipsoidal nucleus and four oil-globules, in the lower half the slender striated podoconus.
The central capsule is filled up by sphericalvacuoles and enclosed by the porous shell; in the centre radii of small granules (nuclei ?
The central capsule is filled up by clear vacuoles and contains a large central nucleus, with a single nucleolus.
The capsule encloses numerous spherical vacuoles and two hemispherical nuclei, each with numerous nucleoli.
Note that there are two contractile vacuoles in the Paramoecium; also that the food-vacuoles have a definite course in their movement inside the endosarc.
The edge was beautifully fringed with a circle of cilia; in an inner circle was a row of locomotive organs, and the centre exhibitedvacuoles constantly opening and shutting.
The branches of the tube stopped somewhat abruptly just before reaching the surface, and were often observed to end in small round vacuoles or vesicles.
When elongated their bodies were somewhat pear-shaped, but more slender, and variegated with vacuoles and particles of food.
The palagonitised glass is often vacuolar, the vacuoles being filled with the same material.
Numerous cracks communicating with the round steam-pores, which are much larger than the vacuoles of the ash-glass, are filled with the same yellowish magma-exudation referred to in the case of the rock forming the centre of the bomb.
This glass is usually isotropic, but much of it is also palagonitic and feebly refractive, the vacuoles or steam-holes, which are often elongated, being in the last case filled with the same palagonitic material.
It shows numerous minute amygdules occupying the original vacuoles of the basic glass; and in its substance occur irregular patches formed of a colourless semi-isotropic mineral which is either zeolitic or a form of opal.
A specimen of the tuffs shows, besides fragments of altered rhyolitic or trachytic rocks, portions of decomposing pumice, the vacuoles and tubular cavities of which are filled with alteration products.
The palagonitic material is usually vacuolar, the vacuoles being filled with palagonitic glass or with a zeolite as in the more altered rocks.
The steam-pores or vacuoles are sometimes empty; and at other times, especially where the palagonitic change has begun, they are filled with a granular alteration product.
These tuffs are made up chiefly of a palagonitised vacuolar basic glass, the vacuoles being filled with the alteration products.
The vacuoles are often drawn out into tubes, giving the glass a fibrillar appearance.
Others are palagonite-breccias with the vacuoles of the altered glass filled with opal.
Sap vacuoles must be distinguished from spores, on the one hand, and the vacuolated appearance due to plasmolysis, on the other.
Note the round or oval cells of granular protoplasm (a) containing solid particles and vacuoles (c), and surrounded by a definite envelope.
A thin cell-wall encloses the granular protoplasm, in which vacuoles and sometimes a nucleus may be noted.
It is usually homogeneous in appearance--sometimes granular--and may contain oil globules or sap vacuoles (Fig.
Students are apt to confuse vacuoles with spores (p.
If vacuoles have any special function, it is an unimportant one.
The vitellus is frequently vacuolated, but occasionally the vacuoles appear to be caused by a shrinking due to the hardening reagent.
Protoplasm transparent, colourless, filled with small vacuoles at regular distances; on the inside of the membrane in the circular periphery of the lens twenty dark oil-globules.
From a morphological point of view they may all be divided into two categories, membraneless vacuoles and vesicular alveoles.
There is no doubt that in the calymma as in the central capsule the vesicular alveoles are secondary products, which have arisen from the vacuoles by the secretion of an enveloping membrane.
As a rule all the vacuolesof the same central capsule are of equal size (generally from 0.
The small hyaline spheres in the young uninucleate capsules of the Polycyttaria are simplevacuoles (Pl.
The alveoles or vacuoles in the calymma of these large Radiolaria lie usually in several layers, one above another, and increase in size from within outwards.
They may be readily distinguished by these means from the clear vacuoles or "hyaline vesicles," which are evenly distributed in the endoplasm of many Radiolaria, and may be confused with the former.
These alveoles or vacuoles have no peculiar wall, but are only cavities in the homogeneous substance of the jelly, and are filled by a clear aqueous fluid.
They have been already described and figured in my Monograph, as "wasserhelle kugelige Blaeschen," and are probably vacuoles or small vesicles filled up by jelly or by a clear fluid.
The same species, showing the two kinds of tentacles (the suctorial and the pointed), and two contractile vacuoles b.
A short time after the appearance of the vacuoles the entire conidium extends itself so that the papilla disappears.
This is deprived of a distinct membrane, the vacuoles that disappeared in the expulsion again become visible, but soon disappear for a second time.
These vacuolesnumber from sixteen to eighteen in P.
This is filled with a granular protoplasm, in which vacuolesare formed.
One or two larger vacuoles may be found; these are the contractile vacuoles; their purpose seems to be to pass off waste material from the cell body.
Other vacuoles appear to be clear; these are spaces in which food has been digested.
This form differs slightly from others of the same species as described by different observers, the most striking difference being the presence of two contractile vacuoles in place of the usual one.
The contractilevacuoles are usually placed in rows upon the edges.
The contractilevacuoles are quite varied and from one to many in number, the number increasing with the size of the individual.
There are one or two contractile vacuolesin the distal half of the body.
There are two contractile vacuoles and one nucleus, which is situated a little above the body center.
Bütschli); in the marine form described below the canal is not developed and a series of vacuoles takes its place; these are all contractile.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "vacuoles" in a variety of sentences. We hope that you will now be able to make sentences using this word.
