Anatomical , histological and histochemical studies of digestive tract of fish Mastacembelus mastacembelus

Dr. Ali Ashgar Abed; Alaa Issa

Article Details

Anatomical , histological and histochemical studies of digestive tract of fish Mastacembelus mastacembelus

Authors:

Dr. Ali Ashgar Abed | Alaa Issa

Publisher:

University of Kirkuk

Journal:

Kirkuk Journal of Science Vol.12 Issue 3, pp.290-314

Document Type:

Article

Publication Date:

9/2017

Document Language:

English

Document ID (Org No.):

2001931939

pISSN:

3005-4788

Keywords:

Abstract:

 The present study involves anatomical comparsion, histological and histochemical structures of digestive tract ofMastacembelusmastacembelus (carnivore) at the level of light microscope hematoxylin and eosin , mallory's triple , periodic acid schiff (PAS) , and alician blue stains (PH1and PH2) were use . The anatomical Results revealed cylindrical muscular tube esophagus connecting  pharynx , directly to cardic stomach of M. mastacembelus .The stomach shape is cystoid  with  cardic, fundic and pyloric portions . Pyloric caeci absent in M. Mstacembelus.intestine is shortest, relative length (RGL) is (0.58) , (S) letter shape and not coiled . Histologically the esophagus of M. Mstacembelus composed of  two parts, anterior and posterior parts .The stomach has cardic , fundic and pyloric portions while intestine divided into four parts, proximal , middle, distal and anus .The arrangement and number of strata forming digestive wall from  esophagus up to anus  is similar in studied fish , involving four basic layers (mucosa , submucosa , mascularis and serosa) . Tunica muscularis along the digestive canal consist of two smooth muscle layers inner (circuler) and outer (longitudinal)  expectesophagus which included stratified muscle layers . Many mucosal folds were lining digestive tract. These folds become crowded, very long and branched along all intestinal divisions and then become very short in anus . Tunica mucosa consist of simple columnar epithelium lining G.I from esophagus to anus . Goblet cells present among esophageal, intestinal and anal mucosal epithelium . They are numerous  along esophagus and posterior intestine . Lamina propria directly under mucosal epithelium consists of thick layer of Connective tissue present in anterior esophagus, stomach and intestine . Lamina propria contain great amount of gastric glands consist of oval or spherical secretory unit lined by one type of pyramedial cell. Posterior stomach mucosal surface contains great amount of gastric pit. muscularis mucosa absent in M. mastacembelus. Tunica submucosa along digestive canal of studied fish consist of thin areolar connective tissue and collection of lymphatic cells similar to lymphatic follicle seen in anterior intestine . G.I serosa layer consist of connective tissue covered bymesotheliur. This  study  showed the presence of different amounts and types of mucous material in different G.I regions . positive tissue reaction with PAS, AB1, AB2 ensure presence of mucous material . Tissue reaction with PAS was very strong in esophagus and intestine while it was strong in  stomach while tissue reaction withAB2 was moderate in esophagus, stomach and intestine .

Article Details

Anatomical , histological and histochemical studies of digestive tract of fish Mastacembelus mastacembelus

Authors:

Dr. Ali Ashgar Abed | Alaa Issa

Publisher:

University of Kirkuk

Journal:

Kirkuk Journal of Science Vol.12 Issue 3, pp.290-314

Document Type:

Article

Publication Date:

9/2017

Document Language:

English

Document ID (Org No.):

2001931939

pISSN:

3005-4788

Histology

digestive tract

Mastacembelusmastacembelus

Issues

Article Details

Anatomical , histological and histochemical studies of digestive tract of fish Mastacembelus mastacembelus

Authors: Dr. Ali Ashgar Abed | Alaa Issa

Publisher: University of Kirkuk

Journal: Kirkuk Journal of Science Vol.12 Issue 3, pp.290-314

Document Type: Article

Publication Date: 9/2017

Document Language: English

Document ID (Org No.): 2001931939

pISSN: 3005-4788

Histology

digestive tract

Mastacembelusmastacembelus

Issues

Authors:

Dr. Ali Ashgar Abed | Alaa Issa

Publisher:

University of Kirkuk

Journal:

Kirkuk Journal of Science Vol.12 Issue 3, pp.290-314

Document Type:

Article

Publication Date:

9/2017

Document Language:

English

Document ID (Org No.):

2001931939

pISSN:

3005-4788