Any decided acidity found in the crop is due to the ingestion of acid food; but a very faint acidity may occur, which results from the presence in the crop of a fluid secreted by the cæcal diverticula of the mesenteron.
The principal appendages of the alimentary canal are the salivary glands, the cæcal diverticula of the stomach, and the Malpighian tubules.
The tubes are diverticula of the stomach and lined by a similar epithelium.
The Malpighian tubules develop as diverticula from the proctodæum, which is an invagination of the outer integument and its morphological equivalent.
This explains the clinically observed fact, that unless treated, pulsion diverticula increase progressively in size, and consequently in distressing symptoms.
Diagnosis is often incidental to examination of the gastrointestinal tract for other conditions, because traction diverticula usually cause no symptoms.
Pressure diverticula occur after middle life, and more often in men than in women.
It has been said that traction diverticula are more readily demonstrated in the roentgenologic examination, if the patient be placed with pelvis elevated.
Congenital webs and diverticula of the trachea are cited infrequently.
A resemblance to the other Echinoderm larvae is found in the fact that coelomic diverticula of the enteron are present.
The same purpose is accomplished by the development of diverticula from the stomach, in which the food is retained and acted on by the gastric juice for longer periods.
In the adult ganoid or teleost these blind diverticula or pouches, varying greatly in shape, number and size, protrude from the intestine immediately beyond the pylorus, usually in close connection with the duodenal entrance of the bile-duct.
These cells are diverticula lined by a continuation of the gastric mucous membrane.
Organs of the adult body, derived by budding from the alimentary entodermal epithelium, in the form of pouch-like diverticula which follow the glandular type of development and become secondarily associated with mesodermal elements.
These pouches or diverticula of the intestine form the so-called pyloric caeca or appendices of these fish.
The secondary pancreatic duct (of Santorini) of the adult corresponds to that section of the proximal or larger embryonic outgrowth situated between the intestine and the point where the two glandular diverticula fuse with each other.
On the other hand in the Ganoids and in many Teleosts longer or shorter finger-shaped diverticula of the midgut are found immediately beyond the pylorus in the region of the bile-duct.
The two diverticula are the rudimentary lobes of the liver and the median canal uniting them is the rudiment of the common bile-duct and gall-bladder.
These malformations are associated chiefly with imperfect development of the visceral or branchial arches and clefts, or of the hypoblastic diverticula from which the thyreoid and thymus glands are formed.
In the Chordata the primitive body cavity is either directly formed from a pair of alimentary diverticula (Cephalochorda) (fig.
The openings of the hepatic diverticula through the sacks lined with thread cells are described by Hancock and Embleton, Ann.
Alimentary diverticula are characteristic of the larvae of the Echinodermata and of Tornaria.
In turning from Amphioxus to the true Vertebrata we find no form in which diverticula of the primitive alimentary tract give rise to the mesoblast.
As the paired diverticula of the lungs grow backwards, the mesoblast around them takes however the form of two lobes, into which they gradually bore their way.
Since the body cavity is not developed as diverticulafrom the cavity of invagination, the latter cavity may conveniently be called the mesenteron and not the archenteron.
B and C, so, arise near the front end of the body and gradually extend backwards as wing-like diverticula of the archenteric cavity.
Pig (Von Baer), break through the ends of the membrane, from which they project as the diverticula allantoidis.
They are found also in the diverticula of the synovial membrane, in the shoulder in the downward prolongation along the tendon of the biceps, in the hip in the bursal extension beneath the psoas.
Further, one may often observediverticula from the extreme anterior end of the oviduct of the bird, which form blind pouches and give one the impression of being receptacula seminis.
By stage K the hepatic diverticula have begun to bud out a number of small hollow knobs.
Almost as soon as it is formed this outgrowth develops two lateral diverticula opening into a median canal.
From the expanded dorsal part of the funnel, especially from its anterior end, numerous small tubular diverticula grow out into the mesoblast.
It is probable that the hepatic diverticula are eventually formed in these compartments.
These are regarded by Ludwig as equivalent to so many openings of the madreporic canal; and there are developed, in correspondence with them, diverticula of the water-vascular ring.
Still later a pair of gill-processes with hepaticdiverticula becomes formed.
There arise, however, two bilaterally symmetrical vaso-peritoneal diverticula from the archenteron.
The later history of the yolk which encloses the mesenteron has not been satisfactorily studied, though it no doubt gives rise to the hepatic tubes, and probably also to the thoracic diverticula of the alimentary tract.
In addition to the contractile radial tentacles ten non-contractile tentacles, also diverticula of the water-vascular ring, are soon formed, two for each interradius.
The relations of the yolk-sack and hepatic diverticula in Cymothoa appear to hold good for Asellus and probably for most Isopoda.
Five of these, alternating with the original diverticula, form the five ambulacral canals, from which diverticula are produced into the ambulacral feet; a sixth gives rise to the Polian vesicle.
The lateral organs or cephalic pits arise in a somewhat unexpected fashion as a pair of diverticula from the oesophagus (fig.
The yolk pyramids of the anterior part of the mesenteron, which projects forwards as a pair of diverticula on each side to the level of the stomach, are not converted into hepatic cylinders till after the larva is hatched.
These diverticula give rise both to the lining of the body cavity and water-vascular system.
Such diverticula of the proctodaeum are not found in Crustacea.
The origin of the body cavity as paired archenteric diverticulahas already been described.
The cells forming the hepatic diverticula and sometimes also those of the stomach may during larval life secrete in their interior peculiar albuminous products, similar to ordinary food-yolk.
The external openings of these ducts become completely closed at about the same time as the shell-gland, and the ducts remain as ciliated diverticula of the auditory pits.
The terminal portion of the rudiment of the salivary gland divides into two parts, each of which sends out numerous diverticula which constitute the permanent glands.
The beautiful pictures of Blanchard, and his description, show how, on the arachnid side, paired diverticula of the stomach are nearly universal in the group.
The explanation of the two optic diverticula given in the last chapter accounts in the same harmonious manner for every other part of the tube around which the central nervous system of the vertebrate has been grouped.
The universality of such diverticula among the arachnids makes it highly probable that their progenitors did possess an alimentary canal with one or more pairs of anterior diverticula.
It is impossible to obtain more decisive evidence that the trilobites possessed a pair of gut-diverticula surrounded to a greater or less extent by the retina and optic nerve of each lateral eye.
The carmine particles, which were driven forward with the proteid- and fat-particles, are not absorbed, but are at intervals driven back by contractions of the anterior diverticula to the middle region of the gut.
Foreign substances of hard consistence which have been swallowed sometimes cause diverticula of the stomach.
The rumen has smooth and not papillose walls, and from it are developed the "water cells," diverticula with narrow mouths provided with a closing sphincter muscle.
The minute diverticulaof that organ, known to human anatomists as the ventricles of Morgagni, alone remain to testify to a former howling apparatus in the ancestors of Man.
From the circular canal two sac-like diverticula called the From Cambridge Natural History, vol.
Each opens in a vas deferens which bears three diverticula or vesiculae seminales, and three pairs of cement glands also are found which pour their secretions through a duct into the vasa deferentia.
The functions of these gastric diverticula have never been carefully investigated.
M, The Malpighian or renal caecal diverticula of Scorpio.
The liver is no longer a compact organ opening by a pair of ducts into the median digestive tract, but we find very numerous hepatic diverticula on a shortened axial tract (fig.
These diverticula extend usually one into each of the dorsal papillae or "cerata" when these are present.
In the Teleostomi one or more glandular diverticula commonly occur at the commencement of the intestine and are known as the pyloric caeca.
Besides these paired vessels a varying number of unpaired branches pass from dorsal aorta to the wall of the alimentary canal with its glandular diverticula (coeliac, mesenteric, rectal).
In the immediate neighbourhood of these ganglia there project upwards two diverticula of the brain-roof known as the pineal organ and the parapineal (or anterior parietal) organ.
He then carefully removed the oesophagealdiverticula with their content of yeast and introduced them into an opening in the skin of the hand.
It was found that as the insect fed, from time to time the abdomen underwent convulsive contractions which resulted in the emptying of the oesophageal diverticula and the salivary glands through blood pressure.
Into this open in each of segments VII, VIII, IX a pair of calciferous glands; these are diverticula of the gut with much folded walls, the cells of which secrete carbonate of lime.
The spermathecae are three pairs of elongated sacs in segments VII-IX, without any diverticulaat all.
Thus the subgenus Ilyogenia (of Ocnerodrilus) has sometimes no spermiducal glands: the genus Perionyx has spermathecae without diverticula in some species, and other genera of Megascolecinae are in a like condition.
The dorsal branch sends a blind twig into each of the diverticula of the dorsal mantle-sinus, the ventral branch supplies the nephridia and neighbouring parts before reaching the ventral lobe of the mantle.
The mantle-sinuses which form the chief spaces in the mantle are diverticula of the main coelomic cavity.
In Nautilus the equivalents of the pancreatic diverticula of the Dibranchs can be traced upon the relatively shorter bile-ducts.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "diverticula" in a variety of sentences. We hope that you will now be able to make sentences using this word.
