Definitions

1. The tubules are pale in color in early life, but in old age they acquire a deep yellow tinge from containing much fatty matter.
2. Dentinal tubules are small open tubes in the dentin that facilitate energy and material transfer between the interior and exterior of the tooth.
3. Dentinal tubules are structures that span the entire thickness of dentin and form as a result of the mechanism of dentin formation.
4. While such tubules are present in the teeth of many species, they do not typically extend to the surface of healthy teeth.
5. Between the tubules are hormone-producing cells called interstitial cells, or cells of Leydig.

Permanent Kidney

1. Some of the tubules of the mesonephros form part of the permanent kidney.

Urinary Tubules

1. They accompany the renal artery and its branches, and are distributed to the bloodvessels and to the cells of the urinary tubules.

Testicular Tubules

1. The germ cells are found to divide and produce early forms; however, at some stage of sperm development, maturation stops throughout the testicular tubules.

Hollow Tubules

1. The reverse is true of the dentin, which is made of many hollow tubules.

Secretory Tubules

1. In contrast to the small balls of cells which comprise secretory acini, secretory cells may also arrange themselves into secretory tubules.

Sperm Mature

1. As the sperm mature, they are stored in the upper compartment of the tubules.

Kidney Tubules Transport System

1. Certain defects in the kidney tubules transport system, which cause imbalances in sodium and phosphate, can lead to high calcium levels in the urine.

Coiled Tubules

1. In mature males this duct may be seen on the ventral surface of the kidneys as a pair of highly coiled tubules.

Existing Dentinal Tubules

1. The resulting dentin contains irregularly shaped dentinal tubules which may not line up with existing dentinal tubules.

Wolffian Tubules

1. Wolffian tubules, precursors of the mesonephros.

Distal Tubules

1. KIDNEYS a. Increased renal tubular reabsorption of calcium in the distal tubules and collecting ducts b.

Renal Corpuscles

1. Note the renal corpuscles and the many profiles of nephric (renal) tubules.
2. The medulla does not have any renal corpuscles, but is composed of nephric tubules, collecting ducts and numerous capillaries.

Pronephric Tubules

1. At the proximal end of the pronephric tubules, ciliated funnels, called nephrostomes, form and open into the coelomic cavity.

Proximal Tubules

1. PTH acts on the proximal tubules in the kidney to decrease reabsorption of phosphate (increasing its excretion in urine, decreasing its serum concentration).
2. In the proximal tubules of the kidneys, renal glutamate produces NH 4 + and a -ketoglutarate.

Glomeruli

1. CD10 stains the proximal convoluted tubules and glomeruli.

Tiny Tubules

1. In stage 0, abnormal cells are found in the tiny tubules where the sperm cells begin to develop.
2. Urine passes from the Bowman's capsule into tiny tubules that lead to large collecting tubes to the center of the kidney.

Collecting Tubules

1. The Collecting Tubules and collecting ducts: The collecting tubule or connecting segment joins the distal convoluted tubule to the collecting duct.
2. In the medulla the collecting tubules of each pyramid converge to join a central tube (duct of Bellini) which opens on the summit of the papilla.

Distal Convoluted Tubules

1. From there the fluid flows through the proximal convoluted tubules, which include the loop of Henle, and then into the distal convoluted tubules.
2. The part of the kidney containing the glomeruli and the proximal and distal convoluted tubules.

Seminiferous Tubules

1. The seminiferous tubules become connected with outgrowths from the Wolffian body, which, as before mentioned, form the efferent ducts of the testis.
2. Seminiferous tubules, coiled tubules lined with germinal epithelium, compose bulk of testis and form sperm in most vertebrates.
3. The higher and longer the testicle resides outside the scrotum, the greater the likelihood of damage to the seminiferous tubules.

Loops

1. Therefore, the medulla consists of portions of the loops of Henle and the collecting tubules.

Invasion

1. Invasion of dentinal tubules by bacteria from supra- or subgingival plaque occurs whenever dentin is exposed in the oral cavity.
2. Invasion of bacteria into the dentinal tubules implies that properties such as adhesion and motility are involved.

Occurring

1. As this is occurring, the mesonephric tubules become long and coiled, with their distal ends opening into the mesonephric duct.

Fig

1. Surrounding the seminiferous tubules are interstitial cells, which include the Leydig cells (Fig.
2. Three areas of the kidney are shown: proximal tubules and capillaries (Fig.
3. Fig. 5. Cross section of bowhead baleen showing three sections: hollow tubules, cementing matrix, and homy covering (70x).

Miles

1. Then no matter what we do by way of treatment, we're never going to completely eradicate the bacteria hiding in the miles of tubules.

Diameter

1. The diameter and density of the tubules are greatest near the pulp.

Presence

1. In presence of diabetes, there was an increase in CYP11B2 immunostaining in glomeruli and proximal tubules.

Interior

1. Microscopic organisms lurking in the maze of tubules simply migrate into the interior of the tooth and set up housekeeping.

Thousands

1. The roots, which are not covered by hard enamel, contain thousands of tiny tubules leading to the tooth's never center (the pulp).

Oral

1. This suggests that many species of oral bacteria do not have the properties necessary to invade tubules and survive within the intratubular environment.
2. Invasion of dentinal tubules by oral bacteria.

Bladder

1. The kava lactones also have an anesthetic effect on the lining of the urinary tubules and the bladder.

Differentiation

1. Nephron formation occurs after the differentiation of the pronephric duct with both the glomeruli and tubules being derived from a nephron primordium.

Antigens

1. Additionally, HCV particles or antigens have been identified in glomeruli and tubules, said Satapathy.
2. As earlier described for other IBV genotypes, antigens of M41 were present not only in renal tubules, but also in the glomerular tuft epithelium [ 27].

Ammonia

1. Ammonia diffuses easily through the tubules into the urine.

Defect

1. Fanconi syndrome-related hypophosphatemia Fanconi syndrome is a defect of the proximal tubules of the kidney, and is associated with renal tubular acidosis.

Network

1. This occurs by migration of bacteria into the network of tubules occupied by processes of the pulpal odontoblasts.

Blood Vessels

1. The blood-testis barrier (abbreviated as BTB) is a barrier between the blood vessels and the seminiferous tubules of the animal testes.

Fluid

1. The tubules contain a fluid, and this fluid carries nutrients and other matter needed to keep teeth Healthy.
2. The dentin then becomes sensitive to external irritants because of the movement of fluid in and out of the dentinal tubules.
3. The fluid that has passed through the distal convoluted tubules is drained into the collecting duct (far left-hand-side of the diagram above).

Immune System

1. In response, the fluid inside the tubules bring immunoglobulins from the immune system to fight the bacterial infection.
2. Since there are millions of these tubules there is room for enough bacteria to challenge the immune system.

Root

1. If the cementum covering the root is not protected any more by the gums it is easily abraded exposing the dentin tubules to external stimuli.

Nerve

1. Once a tooth gets infected and the cavity gets into the nerve and blood vessels, bacteria find their way into those tiny tubules of the dentin.

Tooth Structure

1. You really have to visualize the tooth structure - all of those microscopic tubules running through the dentin.

Periphery

1. Odontoblasts line the periphery of the pulp space and extend cytoplasmic processes into the tubules of the dentin.
2. Spermatogonia are diploid cells, each with 46 chromosomes (23 pairs) located around the periphery of the seminiferous tubules.

Papillae

1. Distal convoluted tubules lead into collecting tubules and ducts which pass through the medullary pyramids to the papillae.
2. Light microscopy shows tumor cells forming cords, papillae, tubules or nests, and are atypical, polygonal and large.

Microorganisms

1. The dentinal tubules in this new dentin are irregular, an arrangement that makes it less permeable to microorganisms.

Exposing

1. Over time this brushing removes gum tissue exposing the tubules.
2. Most people have sensitive teeth because of gum recession exposing the root surface, (or thinning enamel) thus exposing the dentinal tubules.
3. Dentinal hypersensitivity can occur when protective enamel or cementum covering dentin is lost, thereby exposing the dentin tubules to the mouth environment.

Testosterone

1. Between the seminiferous tubules are special cells called Leydig cells (or "interstitial cells") where testosterone and other androgens are formed.

Categories

1. Anatomy > Mouth > Teeth > Dentin
2. Pulp
3. Medicine > Anatomy > Organs > Kidneys
4. Testis
5. Ducts

Related Keywords

* Bacterial Invasion * Blood * Caries * Cells * Cementum * Cords * Cortex * Dentin * Dentinal Tubules * Dentine * Dentin Tubules * Different Areas * Duct * Ducts * Enamel * Epididymis * Fluids * Form * Kidney * Kidneys * Lumen * Meiosis * Mesonephros * Nephron * Nephrons * Nerves * Pulp * Renal * Renal Tubules * Root Canal * Root Canal Treatment * Sensitivity * Smooth * Sperm * Surface * System * Teeth * Testes * Testis * Tooth * Tooth Enamel * Tooth Sensitivity * Tubes * Urine * Vesicles * Water * Wolffian Duct

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