In the Teleostei the vesicles of the cerebral hemispheres appear at first to have a wide lumen, but it subsequently becomes almost or quite obliterated, and the cerebral rudiment forms a small bilobed nearly solid body.
The part of the cerebrum which lies between the two hemispheres, and passes forwards from the roof of the third ventricle round the end of the brain to the optic chiasma, is the rudiment of the lamina terminalis (figs.
The cavity (lv) in each of the rudimentary hemispheres is a lateral ventricle.
The various parts of the corium arise by division of labour from the originally homogeneous cells of the cutis-plate, the outermost lamina of the mesodermic skin-fibre layer (Figure 1.
The cutaneous glands are originally merely solid cone-shaped growths of the epidermis, which sink into the underlyingcorium (Figure 2.
The first structure of this large and elaborate gland is a very simple cone in the epidermis, which penetrates into the corium and ramifies.
The underlying skin (corium or hypodermis) consists chiefly of connective tissue, contains numerous blood-vessels and nerves, and has a totally different origin.
The skin-fibre layer forms thecorium and the motor organs--the skeleton and the muscular system.
Underneath the corium of the mucous membrane there is the fibrovascular layer, which contains the blood vessels, lymphatics and nerves and embedded in the epithelial cells supported by the corium are the numerous mucous glands or follicles.
The corium of the mucous membrane supports an epithelial layer of cells that are of various forms, differing in the different organs that it lines.
The corium lining the capitulum is produced into narrow purple crests, which enter the interstices between the valves, more especially along the line separating the upper and lower whorls.
Within the sack the corium under the valves is tinted pale purple, and two very faint bands of the same colour can generally be distinguished running down the two sides of the peduncle.
No trace of the two acoustic sacks can be perceived in the corium of the young Cirripede, excepting the coloured marks above alluded to.
Small pointed spines, connected with the underlying coriumby tubuli, are not unfrequently articulated on this membrane: the tubuli, however, are often present where there are no spines.
I can hardly doubt that these latter spines, (within which the purple coriumcould be seen to enter a little way,) floating laterally outwards, serve as feelers.
A] The plain surface of the corium has now become broken up, and what is noticed is that the broken-up appearance is due to the epithelial cells irrupting and advancing en échelon into its connective tissue.
The epithelial ingrowths hang down from the epidermis into the corium like the teeth of a comb (Mettam).
They are developed over a modified portion of the corium known as the nail-bed.
Thus the more resistant parts (the horn on the one hand, and the corium covering the foot on the other) are easily torn asunder.
From this it is clear that some considerable portion of the horn of the wall is derived from the cells of the rete Malpighii covering the corium of the foot.
The long finger-like projections of corium into epidermis are sections of the long papillæ from which the horn-tubes of the sole grow.
As an illustration, and one very much to the point at issue, the soft structures of the foot are to the horny covering what the corium of the skin and the rete Malpighii are to the superficial portions of the epidermis.
At this stage the corium has a perfectly plane surface.
The horny laminæ are simply beautifully regular epidermal ingrowths cutting up the corium into minute leaf-like projections.
For the most part the papillæ contain looped capillary vessels, rendering the superficial layer of the corium extremely vascular.
The main portion of the wall is developed from the numerous papillæ covering the corium of the coronary cushion.
Hemelytra with a quadrangular or discoidal areole in the corium near the apex of the clavus (fig.
Ocelli none; wings and hemelytra always present in the adults; no discoidal areole in the corium near the apex of the clavus.
Hemelytra without a quadrangular or discoidal areole in the corium near the apex of the clavus.
Beak slender, cylindrical; the hairy spot on the corium rounded lying next to the inner angle of the membrane.
This ulcer is very superficial, involving only the surface of the corium and the more sensible part of the integument, the papillæ, and extremities of the nervous filaments.
The corium or true hide substance becomes much more swollen by imbibation of water, and when taken out of the new lime is "plumped" to very firm jelly.
There is much hair often in scutch, the hyaline or glassy layer (grain), and the elastic fibres of the corium are also insoluble, and a proportion is derived from the fibres of the adipose tissue on the flesh side.
This is derived partly from the blood and dung associated with the hide, partly from the solution of the corium hide substance, partly from the solution of the softer keratins, and partly also undissolved and loose hair.
At each belt the threads ofcorium within the parietal pores lend off minute branches to supply the thickened wall.
In order to allow of the growth of the edge of the ala, a fine thread of corium runs up the narrow furrow in which the edge is lodged, proceeding from the corium of the sack.
In Xenobalanus, the two folds of coriumare united by longitudinal membranous septa, making a series of quite peculiar, square tubes.
Attention has been drawn to the hardness of the corium and the velvety softness of the skin in the negro; the latter quality is probably due to the profusion and size of the sebaceous glands which accompany the hair.
The body hair has its origin in a layer of the epidermis, deeply imbedded in the corium as though it were in a little sac or follicle (Fig.
The human skin is essentially composed of two parts, the corium (Fig.
First appear circumscribed patches of hyperæmia, in which the papillary layer of the corium is concerned, and which is followed by some thickening of the rete, the epithelia involved becoming coarsely granular.
The formation of a cicatrix is evidently due to the intensity of the process in certain exceptional lesions, as a result of which the papillæ of the corium are superficially destroyed.
The papillæ eventually disappear, the superior portion of the corium being replaced by {447} clusters of medullary or inflammatory elements uninterruptedly connected by threads of living matter.
A section through the thickened skin or a tubercle shows the corium and underlying connective tissue infiltrated with round cells, as in lupus and syphilis; in other words, converted into "granulation tissue.
In a more advanced stage the corium and papillæ are filled with pus-cells, and, becoming disorganized, give rise to the formation of pustules and small abscesses.
Wyss describes the cutaneous nodules as formed by a great proliferation of round cells (like pus-cells) in the upper layer of the coriumjust beneath the papillary layer.
As an organ of evaporation the coriumis similar to the lung.
It originates in the corium and presents two clinical varieties.
That part of the coriumimmediately adjoining the epidermis is known as the papillary portion, and contains the terminal loops of the cutaneous blood vessels and the terminations of the cutaneous nerves.
The skin is composed of a superficial cellular layer--the epidermis, and the corium or true skin.
Immediately above the coriumis the outer skin (epidermis, o), the general covering of the whole outer surface.
From these are formed the skull, the bony case of the brain, and the muscles and corium of the body.
Outside this muscular tube we have the external envelope of the vertebrate body, which is known as the corium or cutis.
No; but exceptionally, from accidental injury, the subjacent corium becomes inflamed, suppurates, and the thickened mass is cast off.
The rete and papillary layer are especially involved, although in severe and chronic cases the lower part of the corium and even the subcutaneous tissue may share in the process.
Primarily the lesion begins in the rete middle layers, and is purely vesicular in character; later, necrosis of the rete and extending deep in the corium is observed.
Angioma is a congenital hypertrophy of the vascular tissues of the corium and subcutaneous tissue.
The corium obtains its food from the body by means of lymph ducts, with which it is well supplied.
Albumins, of which the white of egg is the most familiar variety, occurs to some extent in the corium as serum in the blood-vessels, and also as the liquid filling the connective tissues, known as the lymph.
The corium also contains a small proportion of yellow fibres, known as 'elastic fibres,' which differ physically and chemically from the rest of the skin substance.
When the corium has lost its translucence and has become of a milky-white color throughout the entire thickness of the skin, as can be seen by viewing a cross-section, the skin may be considered tanned.
This part of the corium is so exceedingly close that the fibrils are scarcely recognizable.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "corium" in a variety of sentences. We hope that you will now be able to make sentences using this word.
