Some preliminary observations on the histological development of the fore-stomachs of the lamb I. Histological changes due to age in the period from 46 days of foetal life to 77 days of post-natal life

1961 ◽  
Vol 57 (3) ◽  
pp. 335-341 ◽  
Author(s):  
I. D. Wardrop
Keyword(s):  
Squamous Epithelium ◽  
Basal Layer ◽  
Mucosal Surface ◽  
Age Changes ◽  
General Survey ◽  
Histological Changes ◽  
Foetal Life ◽  
Stratified Squamous Epithelium

1. A general survey of the histological changes of the fore-stomachs of the lambs from 46 days of foetal life to 77 days of post-natal life is presented.2. In all the rumen foetal specimens the mucosal surface was smooth. At birth small, conical papillae were visible and from this age onwards these papillae increased rapidly in size and tended to be long and tongue-shaped in appearance. Little change occurred in the appearance of the rumen papillae after 56 days of age.3. The outlines of the reticulum reticular ribs were visible in the 100-day-old foetal specimen. At birth the normal honeycomb-like structure of the reticulum was well developed, but the papillae on and between the reticular ribs were small and had rounded tips. From 20 days of age onwards the reticulum features increased in size and the papillae became pointed in shape.4. At 46 days of foetal life the omasum wall was folded to form developing laminae and by 70 days of foetal life laminae of four orders were present. The main age changes in the appearance of the mucosal surface from this age onward was an increase in the length of the laminae, the formation of small conical papillae on the laminae, and an increase in the inter-laminae spaces.5. All three fore-stomachs showed the same general histological changes with age. The epithelium changed from a stratified cuboidal type in the foetal specimens to a keratinized, stratified, squamous epithelium in the post-natal specimens. The basal layer of the epithelium became folded to form papillae, reticular ribs and laminae, and in the rumen and reticulum further folding of this layer took place to form papillary bodies.

scholarly journals Prenatal development of the lingual epithelium in goat (Capra hircus)

2017 ◽  
Vol 9 (1) ◽  
pp. 421-426
Author(s):  
Yousuf Dar ◽  
Kamal Sarma ◽  
Shalini Suri ◽  
Jonali Devi
Keyword(s):  
Gestational Age ◽  
Squamous Epithelium ◽  
Age Groups ◽  
Basal Layer ◽  
Prenatal Development ◽  
Capra Hircus ◽  
Lingual Epithelium ◽  
Stage Of Development ◽  
Group I ◽  
Stratified Squamous Epithelium

The present study was conducted on the tongue of 18 goat foetii divided into three prenatal age groups viz- Group I ( below 50 days of gestation), Group II ( between 50-100 days of gestation) and Group III ( above 100 days of gestation to up to full term) containing 6 number of foetii in each group to study the sequential events in regard to histological development of the same in goat foetii. The tongue was lined by 3-4 layered epithelium in the foetus at 40 days of gestation (CRL= 2.40cm). The lingual epithelium consisted of a basal layer of cuboidal cells with squamous to cuboidal shaped more superficial layers. At 62 days of gestation (CRL= 10.10 cm), the lamina epithelialis of the tongue of goat foetus was distinctly stratified. At this stage of development, the epithelial layers could be divided into dark basal and a light apical or superficial zones. At 80-84 days of gestation (CRL=15.3 to 16.0 cm), the stratified squamous epithelium of the tongue was better developed both on the dorsum and ventral surfaces. At 93 days of gestation (CRL= 20.6 cm), the stratified squamous epithelium of the tongue was well developed and all the layers of the epithelium could be observed. In the foetii of gestational age of 100 days onwards, the lingual epithelium of the tongue showed various degrees of keratinization. Thus, it was concluded that the tongue of goat was lined with 3-4 layers of epithelial cells. The degree of stratification increased with an increase in gestational age. Also with age there was an increase in the degree of keratinization. This research further implicated that with further advancement of age the basal layer of the epithelium comprised high cylindrical cells along with well defined basement membrane. The decrepancy of histogenesis and keratogenesis between different species may be due to difference in the duration of the gestation period.

scholarly journals THE STUDY OF HISTOLOGICAL CHANGES OF CROP IN PEGION DURING BROODNESS

2009 ◽  
Vol 33 (1) ◽  
pp. 104-108
Author(s):  
Ali Faris Reshag
Keyword(s):  
Milk Production ◽  
Squamous Epithelium ◽  
Histological Changes ◽  
Epithelium Thickness ◽  
Stratified Squamous Epithelium

We noticed that the histological changes in the crop wall was in the lining epithelia only , also wefound that the pigeon milk production in the 12 day of broodness is enough to feed the young , in whichthe thickness of stratified squamous epithelium was 432 micrometer . There was an important staticaldifferent in the weight of crop epithelium thickness in the 12-16 day of incubation in compare with 1 – 6)day of incubation . There were no histological changes in the structure of crop glands.

Junction of the Epithelium and Lamina Propria of the Bovine Rumen Mucosa

1967 ◽  
Vol 25 ◽  
pp. 68-69
Author(s):  
Al W. Stinson
Keyword(s):  
Osmium Tetroxide ◽  
Squamous Epithelium ◽  
Short Chain Fatty Acids ◽  
Chloride Ions ◽  
Fermentation Products ◽  
Ruminant Species ◽  
Protective Shield ◽  
Stratified Squamous Epithelium ◽  
Lead Hydroxide ◽  
Acetic Acids

The stratified squamous epithelium which lines the ruminal compartment of the bovine stomach performs at least three important functions. (1) The upper keratinized layer forms a protective shield against the rough, fibrous, constantly moving ingesta. (2) It is an organ of absorption since a number of substances are absorbed directly through the epithelium. These include short chain fatty acids, potassium, sodium and chloride ions, water, and many others. (3) The cells of the deeper layers metabolize butyric acid and to a lesser extent propionic and acetic acids which are the fermentation products of rumen digestion. Because of the functional characteristics, this epithelium is important in the digestive process of ruminant species which convert large quantities of rough, fibrous feed into energy.Tissue used in this study was obtained by biopsy through a rumen fistula from clinically healthy, yearling holstein steers. The animals had been fed a typical diet of hay and grain and the ruminal papillae were fully developed. The tissue was immediately immersed in 1% osmium tetroxide buffered to a pH of 7.4 and fixed for 2 hrs. The tissue blocks were embedded in Vestapol-W, sectioned with a Porter-Blum microtome with glass knives and stained with lead hydroxide. The sections were studied with an RCA EMU 3F electron microscope.

Note on the Transformation of Ciliated into Stratified Squamous Epithelium as a result of the Application of Friction

1890 ◽  
Vol 16 ◽  
pp. 119-120 ◽  
Author(s):  
John Berry Haycraft ◽  
E. W. Carlier
Keyword(s):  
Mucous Membrane ◽  
Squamous Epithelium ◽  
The Other ◽  
Ciliated Epithelium ◽  
Deep Groove ◽  
Stratified Squamous Epithelium ◽  
Trachealis Muscle

(Abstract.)In man, in the rabbit, and some other animals the trachea is built up of a series of cartilaginous rings incomplete behind; the rings being completed in this position by the trachealis muscle.The mucous membrane forms a smooth cylindrical lining for the whole tube, and is covered by a ciliated epithelium.In the cat and dog the cartilage rings completely encircle the trachea, and overlap posteriorly, and the trachealis muscle, which is well developed, is placed outside the cartilage, and has a powerful action in varying the diameter of the tube.When this muscle contracts the overlapping ends of the cartilage ride one upon another, and the projecting ends form a vertical ridge down the inside of the trachea, which can be readily seen on slitting the organ open. This ridge is separated by a deep groove from the other end of the plate.

Zimmermann-Laband Syndrome in an Infant with an Atypical Histologic Finding

2005 ◽  
Vol 8 (6) ◽  
pp. 654-657 ◽  
Author(s):  
Mehmet Emre Atabek ◽  
Ozgur Pirgon ◽  
Ahmet Sert ◽  
Hatice Toy
Keyword(s):  
Squamous Epithelium ◽  
Male Infant ◽  
Histologic Finding ◽  
Histopathologic Finding ◽  
Stratified Squamous Epithelium ◽  
Hands And Feet ◽  
Excised Tissue

Zimmermann-Laband syndrome is an inherited disorder that is characterized by abnormalities of the head, face, hands, and feet. Most children with this disorder have generalized hypertrichosis, large gingivae, and hypoplasia of the fingernails and toenails. We report a male infant who exhibited typical features of Zimmermann-Laband syndrome with an unusual histopathologic finding. Excised tissue from the infant's gingivae showed papillary projections that were composed of hyperplastic stratified squamous epithelium with different amounts of keratinization.

scholarly journals Histological analysis of the tongue, esophagus and crop of Southern Carcará (Polyborus plancus)

2021 ◽  
Vol 10 (2) ◽  
pp. e21410212439
Author(s):  
Vanessa Sobue Franzo ◽  
Leiny Paula de Oliveira ◽  
Ana Carolina Pôssas Viana ◽  
Adriano Tony Ramos ◽  
Jéssica Fernanda Bertolino ◽  
...  
Keyword(s):  
Digestive System ◽  
Histological Analysis ◽  
Squamous Epithelium ◽  
Eating Habits ◽  
Histological Study ◽  
Pekin Ducks ◽  
The Family ◽  
Body Weights ◽  
Stratified Squamous Epithelium ◽  
Hematoxylin Eosin

The Southern Caracara is a bird of prey, of the family Falconidae, inhabits all the Brazilian territory, they are omnivorous birds adapted for hunting. The digestive system of the predators presents differences in their morphology due to their eating habits. Knowing the importance of the gastrointestinal system, this study aims to carry out a histological study of the tongue, esophagus and the crop of Polyborus plancus. For this purpose, eight avian of both sexes, with different body weights and ages were used, they were euthanized and the organs were collected, fixed, dehydrated and stained with hematoxylin-eosin. It was noted that the tongue has stratified squamous epithelium with mucous glands and with different degrees of keratinization. The esophagus and crop have four well developed muscle layers and mucous glands. Additionally, in the crop there is presence of an adventitious layer that consists of loose connective tissue. We conclude that the tongue, the esophagus and the crop of the Southern Caracara have similar histological organization of several birds like the Pekin Ducks, ostriches, domestic chicken and partridges.

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