What's the difference between ampulla and duct?

Ampulla


Definition:

  • (n.) A narrow-necked vessel having two handles and bellying out like a jug.
  • (n.) A cruet for the wine and water at Mass.
  • (n.) The vase in which the holy oil for chrism, unction, or coronation is kept.
  • (n.) Any membranous bag shaped like a leathern bottle, as the dilated end of a vessel or duct; especially the dilations of the semicircular canals of the ear.

Example Sentences:

  • (1) Fewer one-cell embryos co-cultured with dissected ampullae for less than 24 h developed to blastocysts than those co-cultured for more than 28 h (P < 0.001).
  • (2) All tumors were adenocarcinomas: 35 patients had adenocarcinoma involving the head of the pancreas, nine, the Vater ampulla, seven, the distal common bile duct, and two, the duodenum.
  • (3) Forty-two patients (age range: 70 to 86 years) underwent pancreaticoduodenectomy between 1970 and 1990 for carcinomas of the pancreas (23), ampulla (8), common bile duct (5), duodenum (5), or islet cells (1).
  • (4) A 60 year old female with a carcinoid tumour of the ampulla of Vater is presented.
  • (5) In the Plotosus electroreceptor, strong brief excitatory pulses to the ampulla induced bi-phasic postsynaptic potential (PSP), externally recorded in the afferent nerves, a fast PSP during the pulse and a later slow PSP.
  • (6) Surgery of the perforated caecum and ampulla recti was carried out during the first 24 hours, and that of the sigmoid flexure on the seventh day.
  • (7) Ova were consistently recovered from the ampulla 24 hours after ovulation, from both the ampulla and isthmus at 48 hours, and from the uterus 72 hours after ovulation.
  • (8) Out of 36 consecutive patients who underwent a pancreatoduodenectomy for carcinoma of the ampulla of Vater, eight patients (long-term survivors) survived more than 5 years after surgery, while eight other patients (short-term survivors) survived less than 12 months after intervention.
  • (9) A biopsy was taken from the mucosa of the intramural part, isthmus, and ampulla in each tube.
  • (10) Cannulation of the ampulla of Vater via a fiberoptic duodenoscope to obtain radiographic visualisation of biliary and pancreatic ductal systems is a new technique to many hospitals.
  • (11) Microsurgical anastomosis restored electrical continuity between anastomosed segments in both the ampulla and isthmus.
  • (12) Coitus induced ovulation produced a characteristic oviductal motility pattern consisting of (i) initial relaxation of both isthmus and ampulla (4-12 h) followed by (ii) increased isthmic motility in the face of a continually relaxed ampulla (36-48 h), and finally phase (iii) leading to restitution of both ampullary and isthmic motility to the base-line at 72-96 h. Estimation of ova positions indicated the presence of fertilized eggs in the ampulla and ampullo-isthmic junction at 48 h and the ova could come to the end of the isthmic segment only at 72 h or after.
  • (13) Other findings included: small seminal vesicles in 1.6% of examinations (Brahman breed highest with 8.6%, P less than .001), enlarged ampullae, 1.9%, 'soft' testicles, 3.4% and small testicles, 7.5%.
  • (14) TEA injection into the ampulla produced an increase in the spike frequency reaction and speeding of adaptation.
  • (15) The concentration of free receptors in the isthmus, isthmus-ampulla and ampulla obtained in the proliferative phase was not significantly different from that of the secretory phase.
  • (16) A national survey was conducted to assess modalities and results of therapy for aneurysm of Galen's ampulla.
  • (17) Among others, a modified suture technique for correcting the combined laceration of Perineum-Ampulla recti-areal (third degree perineal laceration) and a modification of the method for correcting pneumovagina are described.
  • (18) Each ductus deferens specimen was divided into 3 segments: segment A or initial segment (the most proximal to the testis) showing a smooth outer surface and, on section, a uniform lumen and absence of mucosal invaginations; segment B (1.5-4 cm) showing a smooth outer surface and, on section, small cavities in the mucosa; and segment C or ampulla (3-4 cm), which was easily recognisable because of the cerebriform pattern on its outer surface.
  • (19) Except for two cows, one at 46 h and one at 70 h, all cows with more than 50% acrosome-reacted sperm in the ampulla had ovulated before slaughter.
  • (20) Single-shock and repetitive electrical stimulations were applied by means of stimulating electrodes inserted bilaterally into the perilymphatic space of single ampullae of the anterior and lateral semicircular canals.

Duct


Definition:

  • (n.) Any tube or canal by which a fluid or other substance is conducted or conveyed.
  • (n.) One of the vessels of an animal body by which the products of glandular secretion are conveyed to their destination.
  • (n.) A large, elongated cell, either round or prismatic, usually found associated with woody fiber.
  • (n.) Guidance; direction.

Example Sentences:

  • (1) The most actively proliferating region of the excurrent duct system is zone 3 of the epididymis, whereas the least active region is the ductuli efferentes.
  • (2) Endoscopic retrograde cholangiography failed to demonstrate any bile ducts in the right postero-lateral segments of the liver, the "naked segment sign".
  • (3) Immunohistochemical observation of myoepithelial cells with monoclonal antibody from human mammalian cancer suggested that these cells play an important role in the process of glandular ducts formation.
  • (4) Aside from these characteristic findings of HCC, it was important to reveal the following features for the diagnosis of well differentiated type of small HCC: variable thickening or distortion of trabecular structure in association with nuclear crowding, acinar formation, selective cytoplasmic accumulation of Mallory bodies, nuclear abnormalities consisting of thickening of nucleolus, hepatic cords in close contact with bile ducts or blood vessels, and hepatocytes growing in a fibrous environment.
  • (5) High mortality, severe destruction of pancreatic B-cells and presence of sporadic mononuclear infiltrations in islets and around excretory ducts were observed.
  • (6) No methionine-enkephalin-positive nerves could be detected in the common bile duct, pancreatic duct or gallbladder.
  • (7) The most serious complications following operative treatment are retained bile duct calculi (2.8%), wound infection and biliary fistulae.
  • (8) In case of biliary and pancreatic duct obstruction with pure pancreatic reflux, both oedema and inflammatory infiltrations were evident, whereas, in the presence of biliary reflux too, more serious histological features were detected.
  • (9) Dacryography is the only means of exploring the permeability of the lacrymal ducts and to conclude as the whether watering of the eyes is organic or functional.
  • (10) Papillomatosis of the biliary ducts is exceptional.
  • (11) Histological studies with neonatal mice raise the possibility that Müllerian duct tissue may represent a site for the transplacental toxicity of DES in both the male and female fetus.
  • (12) Six of the obstructed livers developed biliary cast formation so extensive that the smaller intrhepatic ducts became plugged to an extent that they could no longer have been treated by surgical mena.
  • (13) The presence of prostatic invasion either into the stroma or involving prostatic ducts and acini only had no adverse effect on outcome.
  • (14) A series of 172 lithiasis of the common bile duct has been analysed.
  • (15) Compared with the portal vein, lymphatic duct revealed a greater resistance to hypoxia.
  • (16) Although 25 Gy IORT plus 50 Gy EBRT was tolerated by the duodenum to 135 days, these doses may cause later pancreatic injury as an expression of damage to blood vessels and ducts.
  • (17) This report describes a newly developed catheter system with the aid of which the cystic duct and gallbladder can be reliably catheterized, retrograde, via an endoscope.
  • (18) Optical light, transmission, and scanning electron microscopy were used in investigations of epithelia in the glandular region of the milk cistern and greater lactiferous ducts and yielded the following findings, four and six hours from infection: degeneration and necrosis of epithelial cells, intraepithelial foreign cell infiltration (neutrophilic granulocytes, lymphocytes, macrophages), intra-epithelial oedema and locally delimited epithelial loss.
  • (19) To study the role of the serum complement system in the early necrosis of acinar cells an acute pancreatitis was produced by injection of basement membrane antibodies into the pancreatic duct of mice and rats.
  • (20) Predisposition to pancreatitis relates to duct size rather than stone size per se.

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