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Updated: September 14, 2025
The mammary glands or udders secrete the milk that nourishes the young. The glands vary in number. Each gland is surmounted by a teat or nipple. The glandular tissue consists of caecal vesicles that form grape-like clusters around the milk tubules.
On the contrary, in the brain the gray cortex, or rind, is less transparent than the white nerve tubules in the centre. The denser fibrous tissues, such as the ligaments of joints and the tendons or sinews of muscles, cast very perceptible shadows, so that when we come to a thick tendon like the tendo Achillis, the shadow approaches even the density of the shadow cast by bone. Mr.
Bohannan departed. The droning of the helicopters rose to a shrill hum. The Master switched in the air-pressure system; and far underneath, white fountains of spumy water leaped up about the floats, mingled with sand and mud all churned to frenzy under the bursting energy of the compressed air released through thousands of tubules.
Like tic-douloureux, its sensation is a curiously fluctuating one, as if pain had been fluidized and poured in trickling streams through the tubules of nerve tissue which are affected by it; but, unlike that, it affects every tubule in the human body not a single diseased locality.
The prevailing view now is that the processes of filtration and secretion are both carried on by the kidneys,—that the capillary clusters in the Malpighian bodies serve as delicate filters for the separation of water and salts, while the secreting cells of the tubules separate substances by the process of secretion.
From the capsule the tubule extends toward the concave side of the kidney and, after uniting with similar tubules from other parts, finally terminates at the pyramid. Between its origin and termination, however, are several convolutions and one or more loops or turns.
But then something struck a familiar note, and he remembered studying the peculiar Moruan renal system, in which the creature's chemical waste products were filtered from the bloodstream in a series of tubules passing across the peritoneum, and re-absorbed into the intestine for excretion.
They form one of the most active and important groups in the body, and their revolt is dangerous in proportion. The movement of the process is usually somewhat upon this order: After forty, fifty, or even sixty years of loyal service, the cells lining one of the tubules of a gland for instance, of the lip, or tongue, or stomach begin to grow and increase in number.
Small artery entering capsule and forming cluster of capillaries within. e. Small vein leaving capsule and branching into c, a second set of capillaries, h. Beginning of uriniferous tubule. The uriniferous tubules are lined with secreting cells. These differ greatly at different places, but they all rest upon a basement membrane and are well supplied with capillaries. Branch from renal artery. 2.
After passing a distance many times greater than from the surface to the center of the kidney, the tubule empties its contents into the expanded portion of the ureter. Outer portion or cortex. 2. Medullary portion. 3. Pyramids. 4. Pelvis. 5. Ureter. A. Small section enlarged to show the tubules and their connection with the capsules.
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