Word Finder - gland

definition

An organ that synthesizes a substance, such as hormones or breast milk, and releases it, often into the bloodstream (endocrine gland) or into cavities inside the body or its outer surface (exocrine gland).

definition

A secretory structure on the surface of an organ.

They have a musk gland on top of their rump that produces a smell when they get upset.

B, Sole of the foot of Pyrula tuba, to show a, the pore usually said to be " aquiferous " but probably the orifice of a gland; b, median line of foot.

The gland has been found in both sub-orders of the Pectinibranchia, in Cyclostoma and Cypraea among the Taenioglossa, in Hemifusus, Cassis, Nassa, Murex, Fasciolariidae, Turbinellidae, Olividae, Marginellidae and Conidae among the Stenoglossa.

There is a gland on the back.

Thus the base of the gill passes in a slanting direction across the right-hand side of the kidney, the posterior end being dorsal to the apex of the gland, and the anterior end ventral to the right-hand corner.

The secretion of milk, if occurring in the mammary gland, is much diminished or entirely arrested.

This c and common cross fertilization is often effected by the gland g.

Orifice of coxal gland probably situated at base of coxa of 5th appendage; sternal plate of prosoma minute or absent; no prosternal element underlying the mouth.

The gland spaces vary in size and many may show marked cystic formation.

An ectodemic invagination forms a large mucous gland on the foot, which is more or less atrophied in adult life.

The drug appears to have no influence upon the contractile cells that constitute muscle-fibre, any more than it has directly upon the secretory cells that constitute any gland.

Most of these animals were of small size, and many had long upper canines, like those of the existing Hydrelaphus; while in all there was no depression for a gland in front of the eye.

There is a tarsal, but no metatarsal gland and tuft.

A slight change in the structure or activity of a gland, by altering the internal secretion, may produce widespread alterations even in an adult organism; and we have good reason to suppose that, if compatible with viability, such minute changes would have even a greater ultimate effect if they occurred in an embryo.

W, wax-yielding surface, covering true gland; s, septem, or carina; wh, webbed hairs.

In all these antelopes long cylindrical horns are present in both sexes; the muzzle is hairy; there is no gland below the eye; the tail is long and tufted; and in the breadth of their tall crowns the upper molar-teeth resemble those of the oxen.

Extracts of supra-renal gland have been found useful.

In the friction-clutch, a pulley loose on a shaft has a hoop or gland made to embrace it more or less tightly by means of a screw; this hoop has short projecting arms or ears.

Mind, driven from the field of extension, erects its last fortress in the pineal gland.

While the oviducts always open directly on to the exterior, it is the rule for the sperm ducts to open on to the exterior near to or through certain terminal chambers, which have been variously termed atrium and prostate, or spermiducal gland.

Fusus, Pyrula, Purpura, Murex, Nassa, Trophon, Voluta, &c. The float of the pelagic Janthina, to which the egg-capsules are attached, probably is also formed by the secretion of the pedal gland.

The kidney has similar relations in both species, and is identical with the organ spoken of by many authors as the triangular gland.

Orifice of the grape-shaped (supposed poisonous) gland.

The musky odour from which the animal takes its name does not appear to be due to the secretion of any gland.

Appendages of 1st pair have two segments, as in Pedipalpi, but are furnished with poison gland, and are retroverts.

The " retrovert " or bent-back first pair of appendages is provided with a poison gland opening on the fang or terminal segment.

The gland is supposed to secrete a ferment, which, being absorbed into the portal circulation, breaks up a certain portion at least of the grape-sugar contained in the portal blood, and so prevents this overflowing into the circulation in general.

A salivary gland degenerates when its nerve-supply is cut off.

The functions of the thymus gland begin to cease after the second year from birth.

Should this take place into a closed gland space it will give rise to cysts, which may attain a great size, as is seen in the ovarian adenomata.

These changes are found in senile wasting, in metaplasia of cartilage, in many tumours, especially mixed growths of the parotid gland and testicle, and in various inflammatory granulation ulcers.

In the wasting of the thyroid gland in myxoedema, or when the gland is completely removed by operation, myxomatous areas are found in the subcutaneous tissue of the skin, nerve-sheaths, &c.

It may follow a diminished functional activity, as in the atrophying thymus gland' and in the muscle cells of the uterus after parturition.

Hippocrates had no opportunity of verification by necropsy, and Sydenham ignored pathology; yet the clinical features of many but recently described diseases, such, for example, as that named after Graves, and myxoedema, both associated with perversions of the thyroid gland, lay as open to the eye of physicians in the past as to our own.

The uterus (X in figure C) begins in all cases at the shell gland (c, d) and may exhibit a swelling (R S) for the retention of the spermatozoa..

This spur, which attains the length of nearly an inch, is traversed by a minute canal, terminating in a fine longitudinal slit near the point, and connected at its base with the duct of a large gland situated at the back part of the thigh.

The acid gland consists of one, two or more tubes, with a cellular coat of several layers, opening into a reservoir whence the duct leads to the exterior.

The alkaline gland is an irregular tube with a single cellular layer, its duct opening alongside that of the acid reservoir.

The foot has a byssus gland on its posterior surface.

A pair of large glandular outgrowths, the so-called " liver " or great digestive gland, exists as in other Molluscs.

In many Lamellibranchs a gland is found on the hinder surface of the foot in the mid line, which secretes a substance which sets into the form of threads - the so-called " byssus " - by means of which the animal can fix itself.

Sometimes this gland is found in the young and not in the adult (Anodonta, Unio, Cyclas).

The left inner gill-plate is also snipped to show the subjacent orifices of the left renal organ x, and of the genital gland (testis or ovary) y.

In Arca too and many others it carries a byssus-forming gland and a byssuscementing gland.

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.

In the allied genus Cyclas, a byssus gland is formed in the foot and subsequently disappears, but no such gland occurs in Pisidium.

In addition to the characters given above, it may be noted that the mantle is provided with a hypobranchial gland on the outer side of each gill, the auricles are muscular, the kidneys are glandular through their whole length, the sexes are separate.

The special gland of the musk-deer, which has made the animal so well known, and has proved the cause of unremitting persecution to its possessor, is found in the male only, and is a sac about the size of a small orange, situated beneath the skin of the abdomen, the orifice being immediately in front of the preputial aperture.

As each genital gland enlarges it remains attached to the rest of the intermediate cell mass by a constricted fold of the coelomic membrane, known as the mesorchium in the male, and the mesovarium in the female.

It is through this anterior border that the vessels and nerves enter and leave the gland.