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Topic: Duct (anatomy)

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In the News (Thu 20 Jun 19)

 eMedicine - Laceration, Canalicular : Article by Louise A Mawn, MD
The lacrimal drainage apparatus consists of the puncta on the upper lid and the lower lid, the canaliculi, the common canaliculus, the lacrimal sac, and the nasolacrimal duct.
Injuries to the lacrimal drainage system can be quite complex and involve not only the tear drainage system but also the lid anatomy, including the medial canthal tendon.
Attention to the anatomy of the lacrimal drainage system and the medial aspect of the lid is critical for those ophthalmologists and emergency physicians who are assessing these injuries.
www.emedicine.com /oph/topic218.htm

 eMedicine - Pancreas Divisum : Article by Majid A Khan, MD
Background: Pancreatic divisum, the most common congenital variant of the pancreatic anatomy, occurs when the ductal systems of the ventral and dorsal pancreatic ducts fail to fuse.
Although secretin-stimulated US in pancreas divisum may not demonstrate the anomalous ductal anatomy; it may provide evidence of stenosis in patients with acute recurrent pancreatitis or chronic pancreatitis and predict which patients may respond to surgical or endoscopic therapy.
Typically, the main pancreatic duct is derived from both embryologic parts of the pancreas; the dorsal pancreas provides the main duct in the tail and body of the gland and the ventral pancreas provides the main duct in the head of the gland.
www.emedicine.com /RADIO/topic520.htm

 Relationship between Left Biliary Duct System and Left Portal Vein: Evaluation with Three-dimensional Portocholangiography -- Cho et al. 228 (1): 246 -- Radiology
Index terms: Bile duct radiography, 76.122 • Bile ducts, anatomy, 76.92 • Bile ducts, CT, 76.12112, 76.12115, 76.12117 • Bile ducts, neoplasms, 76.321 • Portal vein, anatomy, 957.92 • Portal vein, CT, 957.12912
Relationship between Left Biliary Duct System and Left Portal Vein: Evaluation with Three-dimensional Portocholangiography -- Cho et al.
evaluate the relationship between the left biliary duct system
radiology.rsnajnls.org /cgi/content/abstract/228/1/246

 Planetary Anatomy · Astrological definition of Planetary Anatomy · Astrology Encyclopedia
Sun: Operates chiefly through the anterior pituitary gland, to affect the circulation of the blood through the heart and the arteries; the tear ducts; the spinal cord.
Moon: The substance of the body, as distinguished from the vitality flowing through it; the alimentary canal; the child-bearing female organs and functions; the lymphs; the sympathetic nervous system; the cerebellum, the lower ganglia.
www.astrologyweekly.com /dictionary/planetary-anatomy.php   (773 words)

 School of Anatomy - ANAT2200- Glossary
Danish mathematician and philosopher, doctor in Basel, anatomist at Cophenhagen; discovered thoracic duct and lymphatic system in 1653; wrote a textbook of anatomy.
1722-1789 Professor of Medicine, Anatomy, Surgery and Botany in Gronningen; C.'s fascia = superficial layer of superficial fascia of skin of abdomen (1801).
Canadian anatomist; B. body = intranuclear satellite = sex-chromatin mass seen in a certain proportion of the cells of a female.
anatomy.med.unsw.edu.au /teach/anat2200/2000/appen4.htm   (8068 words)

 VIII. The Lymphatic System. 2. The Thoractic Duct. Gray, Henry. 1918. Anatomy of the Human Body.
In the thorax the duct is joined, on either side, by a trunk which drains the upper lumbar lymph glands and pierces the crus of the diaphragm.
The thoracic duct has several valves; at its termination it is provided with a pair, the free borders of which are turned toward the vein, so as to prevent the passage of venous blood into the duct.
Its orifice is guarded by two semilunar valves, which prevent the passage of venous blood into the duct.
www.bartleby.com /107/176.html   (867 words)

 XI. Splanchnology. 3. The Urogenital Apparatus. Gray, Henry. 1918. Anatomy of the Human Body.
The ducts pass backward lateral to the Wolffian ducts, but toward the posterior end of the embryo they cross to the medial side of these ducts, and thus come to lie side by side between and behind the latter—the four ducts forming what is termed the genital cord (Fig.
In the male the Wolffian duct persists, and forms the tube of the epididymis, the ductus deferens and the ejaculatory duct, while the seminal vesicle arises during the third month as a lateral diverticulum from its hinder end.
The diverticulum from the Wolffian duct grows dorsalward and forward along the posterior abdominal wall, where its blind extremity expands and subsequently divides into several buds, which form the rudiments of the pelvis and calyces of the kidney; by continued growth and subdivision it gives rise to the collecting tubules of the kidney.
www.bartleby.com /107/252.html   (3757 words)

 Cerfolio - Ligation of the Thoracic Duct for Chylothorax
This can be helpful in delineating the anatomy of the thoracic duct, which is aberrant in almost 40% of patients.
The thoracic duct is a tubular structure that is 2 to 3 mm in diameter, valved, and paper-thin.
This is because the chylothorax is secondary to an injury to the main thoracic duct.
www.ctsnet.org /doc/6418   (1828 words)

 Thoracic duct - Wikipedia, the free encyclopedia
In human anatomy, the thoracic duct is an important part of the lymphatic system — it is the largest lymphatic vessel in the body.
When the thoracic duct is blocked or damaged a large amount of lymph can quickly accumulate in the pleural cavity, this situation is called chylothorax.
The first sign of a malignancy (especially an intraabdominal one) may be an enlarged Virchow's node, a lymph node in the left supraclavicular area, in the vicinity where the thoracic duct empies into the left subclavian vein.
en.wikipedia.org /wiki/Thoracic_duct   (289 words)

 IX. Neurology. 5e. The Trigeminal Nerve. Gray, Henry. 1918. Anatomy of the Human Body.
The branch of communication from the lingual to the forepart of the ganglion is by some regarded as a branch of distribution, through which filaments pass from the ganglion to the lingual nerve, and by it are conveyed to the sublingual gland and the tongue.
The fibers from the superior nucleus constitute the mesencephalic root: they descend through the mid-brain, and, entering the pons, join with the fibers from the lower nucleus, and the motor root, thus formed, passes forward through the pons to its point of emergence.
The inferior or chief nucleus is situated in the upper part of the pons, close to its dorsal surface, and along the line of the lateral margin of the rhomboid fossa.
www.bartleby.com /107/200.html   (5634 words)

 X. The Organs of the Senses and the Common Integument. 1c. 3. The Accessory Organs of the Eye. Gray, Henry. 1918. Anatomy of the Human Body.
The Lacrimal Ducts ( ductus lacrimalis; lacrimal canals).
The superior lacrimal gland is connected to the periosteum of the orbit by a few fibrous bands, and rests upon the tendons of the Recti superioris and lateralis, which separate it from the bulb of the eye.
896) consists of ( a) the lacrimal gland, which secretes the tears, and its excretory ducts, which convey the fluid to the surface of the eye;( b) the lacrimal ducts, the lacrimal sac, and the nasolacrimal duct, by which the fluid is conveyed into the cavity of the nose.
www.bartleby.com /107/227.html   (5634 words)

 eMedicine - Biliary Disease : Article by Paul Yakshe, MD
Cholangiocarcinoma is an adenocarcinoma of the bile ducts.
Biliary disease is caused by abnormalities in bile composition, biliary anatomy, and function.
The pain is caused by an obstruction to the flow of bile, with distension of the biliary lumen, and is clinically similar whether the obstruction occurs at the cystic duct or at another level of the common bile duct.
www.emedicine.com /med/topic225.htm   (5634 words)

 XI. Splanchnology. 1e. The Lungs. Gray, Henry. 1918. Anatomy of the Human Body.
The primary lobule consists of an alveolar duct, the air spaces connected with it and their bloodvessels, lymphatics and nerves.
Each alveolar duct is connected with a variable number of irregularly spherical spaces, which also possess alveoli, the atria.
With each atrium a variable number (2–5) of alveolar sacs are connected which bear on all parts of their circumference alveoli or air sacs.
www2.bartleby.com /107/240.html   (2952 words)

 XI. Splanchnology. 4. The Ductless Glands. Gray, Henry. 1918. Anatomy of the Human Body.
The connection of the diverticulum with the pharynx is termed the thyroglossal duct; its continuity is subsequently interrupted, and it undergoes degeneration, its upper end being represented by the foramen cecum of the tongue, and its lower by the pyramidal lobe of the thyroid gland.
It grows downward and backward as a tubular duct, which bifurcates and subsequently subdivides into a series of cellular cords, from which the isthmus and lateral lobes of the thyroid gland are developed.
There are certain organs which are very similar to secreting glands, but differ from them in one essential particular, viz., they do not possess any ducts by which their secretion is discharged.
www.bartleby.com /107/272.html   (2952 words)

 VI. The Arteries. 5. The Arteries of the Trunk. a. The Descending Aorta. Gray, Henry. 1918. Anatomy of the Human Body.
The superior phrenic branches are small and arise from the lower part of the thoracic aorta; they are distributed to the posterior part of the upper surface of the diaphragm, and anastomose with the musculophrenic and pericardiacophrenic arteries.
The esophagus, with its accompanying plexus of nerves, lies on the right side of the aorta above; but at the lower part of the thorax it is placed in front of the aorta, and, close to the diaphragm, is situated on its left side.
At its commencement, it is situated on the left of the vertebral column; it approaches the median line as it descends; and, at its termination, lies directly in front of the column.
www.bartleby.com /107/153.html   (1464 words)

 Chylothorax in Dogs and Cats
Rupture of the thoracic duct secondary to trauma was once thought to be the sole cause of chylothorax, but it has been shown that the thoracic duct remains intact in the majority of patients.
Ligation of the thoracic duct has been shown to be beneficial in 20% to 60% of dogs and cats with idiopathic chylothorax.
Positive contrast mesenteric lymphangiography is useful to determine lymphatic anatomy and post-ligation success.
www.vet.uga.edu /vpp/CLERK/Rockwell   (2108 words)

 Oncology Nursing Society.
Miller, J.I. Anatomy of the thoracic duct and chylothorax.
When the thoracic duct is injured, the increase in the volume of chest tube fluid is explained by the large quantity of chyle, which could range from 1,500-2,500 ml/day in response to the fat content in a patient's diet.
The thoracic duct consistently originates in the abdomen from anywhere in the area of the lower thoracic to the upper lumbar vertebral level in the body.
www.ons.org /publications/journals/CJON/Volume5/Issue3/0503113.asp   (2636 words)

 Research - Lacrimal Gland Secratory Ducts
The average diameter for the 214 ducts was 0.66mm, with a range of 0.30 - 1.05mm, and the average length was 2.31mm with a range of 0.80 - 5.60mm.
Each secretory duct was measured for diameter and length, and each ductal orifice for its distance from the lateral canthus and from the superior border of the tarsus.
The ducts and conjunctiva of several dissected glands were removed and examined histologically to determine the false positive and false negative rates.
www.laserspecialist.com /Research.htm   (2636 words)

The cystic duct was already dissected and opened to perform a cholangiogram.This study has shown an obstruction in the distal common bile duct (CBD) therefore exploration is warranted.
The cystic duct is ligated with an Endoloop to ensure a tight closure.
Once, the decision to perform a trans cystic approach is made, the dissection of the cystic duct is extended closer to the CBD.
www.laparoscopy.com /pictures/tccbde.html   (2636 words)

 Dunbar Law Office Newsletter
The gallbladder is grasped and a process of meticulous dissection begins to remove tissue and/or adhesions from the gallbladder and cystic duct so that accurate identification of the anatomy occurs.
Because the cystic duct and cystic artery are the structures to be divided, it is these structures only that must be conclusively identified in every laparoscopic cholecystectomy.
The gallbladder is removed surgically by clipping and transecting the cystic duct and the cystic artery so as to allow the gallbladder to be removed.
www.freeadvice.com /resources/articles/dunbar.htm   (2636 words)

 Dunbar Law Office Newsletter
Because there are variations in the biliary anatomy, most surgeons agree that the safest practice is to perform a cholangiogram before a transection of any duct.
Since the biliary ducts do not have profuse blood circulation, scar tissue may form at the site of a repair causing a stricture or narrowing that blocks the flow of bile.
When the base of the gallbladder is not pulled to the patient's right side, oftentimes the cystic duct aligns parallel to the common bile duct which can lead to misidentification.
www.freeadvice.com /resources/articles/dunbar.htm   (2636 words)

 Anatomy - Upper Extremity
The thoracic duct arises from the cisterna chyli, an elongated lymphatic sac which lies on the 1st and 2nd lumbar vertebrae between the aorta and the right crus of the diaphragm.
The thoracic duct ascends on the vertebral column between the azygos vein and the descending aorta.
The right lymphatic duct drains mostly the upper right quadrant of the body while the rest of the body is drained by the thoracic duct.
cats.med.uvm.edu /cats_teachingmod/gross_anatomy/thorax/pages/drainage.html   (695 words)

 eMedicine - Nasolacrimal System Anatomy : Article by Bobbie Parwar, MD
Muller KM, Busse H, Osmers F: Anatomy of the naso-lacrimal duct in new-borns: therapeutic considerations.
The venous plexus surrounding the lacrimal sac continues inferiorly to surround the nasolacrimal duct, eventually connecting to the vascular tissue of the inferior turbinate.
The nasolacrimal duct consists of a 12-mm superior intraosseous portion and a 5-mm inferior membranous portion.
www.emedicine.com /ent/topic5.htm   (695 words)

 Gross Anatomy II-13120
name, describe, and identify the gross anatomy of the liver, its lobes, visceral impressions, landmarks, and anatomical relationships with the gallbladder and biliary duct system.
Since embryology augments the student's understanding of both normal and abnormal anatomical morphology and relationships, Gross Anatomy II (Course #13120) lectures and Embryology (Course #14220) lectures are coordinated.
The gross anatomy of the special sense organs and the nervous, circulatory, digestive, respiratory, urogenital, and endocrine systems; systemic and regional interrelationships.
www.nwhealth.edu /syllabi/gros2syl.html   (695 words)

 Eye Anatomy & Physiology - VisionChannel
Once the muscles relax and the eye opens, the tears move from the sac to the nasolacrimal duct and into the nose.
The stabilization of eye movement is accomplished by six extraocular muscles that attach to each eyeball and perform their horizontal and vertical movements and rotation.
The eyelids are moveable folds of skin that protect the front surface of the eyes.
www.visionchannel.net /anatomy.shtml   (978 words)

 VESTA: Training Critical Steps
Bile duct injury can be the result of poor technique or misinterpretation of the anatomy.
If the duct about to be clipped will not fit entirely within a 9mm clip (which should close around the duct to seal it), assume it is the common duct (because the common duct has a larger diameter than the cystic duct).
This allows the cystic duct to be identified with greater certainty, since it will be found as a continuation of the gallbladder.
itsa.ucsf.edu /~frankt/critical.html   (978 words)

 Anatomy Tables - Duodenum, Pancreas, Liver, & Gallbladder
A concretion in the gall bladder or a bile duct, composed chiefly of cholesterol crystals.
duct of the gallbladder; unites with common hepatic duct to form common bile duct
region of undersurface of liver where hepatic ducts, hepatic aa.
anatomy.med.umich.edu /abdomen/duodenum_tables.html   (978 words)

 Laparoscopic Cholecystectomy
Early in the national experience with laparoscopic cholecystectomy it became apparent that some surgeons who were in the early phases of their training would misidentify the anatomy and inadvertently clip and divide the common bile duct thinking it to be the cystic duct.
To avoid this tenting up of the common bile duct and to gain better exposure of the cystic duct, common duct, cystic artery area (Triangle of Calot), a second grasping instrument is now used to grasp the proximal portion of the gall bladder (Hartmann's pouch) and retract it inferiorolaterally.
2) Once the cystic duct, common bile duct and cystic artery have been clearly identified and dissected free of each other and other fibrous and fatty tissue, it is now safe to ligate and divide the cystic duct and the cystic artery.
www.lectlaw.com /med/med12.htm   (978 words)

 Liver Anatomy and Function, Cincinnati Children's Hospital Medical Center
The larger ducts join to form the hepatic duct.
Bile is a substance that helps carry away wastes and is needed for the breakdown and absorption of dietary fats.
Inside the two lobes is a network of tubes, also called the biliary tree that carries bile from the liver to the intestine.
www.cincinnatichildrens.org /health/info/liver/anatomy   (238 words)

Wolffian and Mullerian ducts- _________________________________ (so there is no internal reproductive anatomy except for testes)
Wolffian ducts have already begun to degenerate by then, and are no longer capable of responding to testosterone.)
Wolffian duct – _________________ into male derivatives (due to local action of testosterone)
www.soc.hawaii.edu /ws350/spr04/absexdev.htm   (1169 words)

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