Suchergebnisse - "Intestine, Small"

Primary Small Intestinal Epithelia Are Physiological Alternatives to the Caco-2 Lymphatic Transport Model.

Autoren: Smith IM Rezhdo O Pan M et al.

Quelle: Molecular pharmaceutics [Mol Pharm] 2025 Dec 01; Vol. 22 (12), pp. 7313-7330. Date of Electronic Publication: 2025 Nov 10.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: American Chemical Society Country of Publication: United States NLM ID: 101197791 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1543-8392 (Electronic) Linking ISSN: 15438384 NLM ISO Abbreviation: Mol Pharm Subsets: MEDLINE

MeSH-Schlagworte: Intestinal Mucosa*/metabolism , Intestine, Small*/metabolism , Intestine, Small*/cytology, Humans ; Caco-2 Cells ; Animals ; Mice ; Chylomicrons/metabolism ; Biological Transport/physiology ; Phenanthrenes/pharmacokinetics ; Oleic Acid ; Micelles ; Alanine/analogs & derivatives ; Apolipoprotein B-48/metabolism ; Duodenum/metabolism ; Ileum/metabolism ; Glycerides

Effects of patient and imaging factors on small bowel motility scores derived from deep learning-based segmentation of cine MRI.

Autoren: Heo S Yun J Kim DW et al.

Quelle: European radiology [Eur Radiol] 2025 Dec; Vol. 35 (12), pp. 7510-7519. Date of Electronic Publication: 2025 Jun 17.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: Springer International Country of Publication: Germany NLM ID: 9114774 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1432-1084 (Electronic) Linking ISSN: 09387994 NLM ISO Abbreviation: Eur Radiol Subsets: MEDLINE

MeSH-Schlagworte: Magnetic Resonance Imaging, Cine*/methods , Deep Learning* , Gastrointestinal Motility*/physiology , Intestine, Small*/diagnostic imaging , Intestine, Small*/physiopathology , Constipation*/diagnostic imaging , Constipation*/physiopathology, Humans ; Female ; Male ; Middle Aged ; Aged ; Adult ; Retrospective Studies

Surgical management of small bowel neuroendocrine neoplasms in Crohn's disease: a multicenter retrospective analysis.

Autoren: Violante T Ferrari D Larson DW et al.

Quelle: Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract [J Gastrointest Surg] 2025 Dec; Vol. 29 (12), pp. 102246. Date of Electronic Publication: 2025 Nov 03.

Publikationsart: Journal Article; Multicenter Study

Info zur Zeitschrift: Publisher: Elsevier B.V Country of Publication: Netherlands NLM ID: 9706084 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-4626 (Electronic) Linking ISSN: 1091255X NLM ISO Abbreviation: J Gastrointest Surg Subsets: MEDLINE

MeSH-Schlagworte: Crohn Disease*/complications , Neuroendocrine Tumors*/surgery , Neuroendocrine Tumors*/etiology , Neuroendocrine Tumors*/mortality , Neuroendocrine Tumors*/pathology , Intestinal Neoplasms*/surgery , Intestinal Neoplasms*/etiology , Intestinal Neoplasms*/mortality , Intestinal Neoplasms*/pathology , Intestine, Small*/surgery , Intestine, Small*/pathology , Ileal Neoplasms*/surgery, Humans ; Male ; Female ; Retrospective Studies ; Middle Aged ; Adult ; Aged ; Neoplasm Recurrence, Local/epidemiology ; Survival Rate ; Young Adult ; Postoperative Complications/epidemiology ; Treatment Outcome

Spatial metabolic gradients in the liver and small intestine.

Autoren: Samarah LZ Zheng C Xing X et al.

Quelle: Nature [Nature] 2025 Dec; Vol. 648 (8092), pp. 182-190. Date of Electronic Publication: 2025 Oct 15.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: Nature Publishing Group Country of Publication: England NLM ID: 0410462 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1476-4687 (Electronic) Linking ISSN: 00280836 NLM ISO Abbreviation: Nature Subsets: MEDLINE

MeSH-Schlagworte: Intestine, Small*/metabolism , Intestine, Small*/cytology , Liver*/metabolism , Liver*/cytology, Animals ; Female ; Male ; Mice ; Citric Acid/metabolism ; Citric Acid Cycle ; Energy Metabolism ; Fructose/metabolism ; Glutamine/metabolism ; Lactic Acid/metabolism ; Malates/metabolism ; Mice, Inbred C57BL ; Deep Learning

Langerhans cell histiocytosis with mesenteric involvement successfully treated with trametinib: a rare cause of small intestine obstruction.

Autoren: Chang L Shen KN Luo YP et al.

Quelle: International journal of hematology [Int J Hematol] 2025 Dec; Vol. 122 (6), pp. 908-910. Date of Electronic Publication: 2025 Sep 22.

Publikationsart: Journal Article; Case Reports

Info zur Zeitschrift: Publisher: Springer Japan Country of Publication: Japan NLM ID: 9111627 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1865-3774 (Electronic) Linking ISSN: 09255710 NLM ISO Abbreviation: Int J Hematol Subsets: MEDLINE

MeSH-Schlagworte: Histiocytosis, Langerhans-Cell*/drug therapy , Histiocytosis, Langerhans-Cell*/complications , Histiocytosis, Langerhans-Cell*/genetics , Histiocytosis, Langerhans-Cell*/diagnosis , Histiocytosis, Langerhans-Cell*/diagnostic imaging , Histiocytosis, Langerhans-Cell*/pathology , Pyrimidinones*/administration & dosage , Pyrimidinones*/therapeutic use , Pyridones*/administration & dosage , Pyridones*/therapeutic use , Mesentery*/pathology , Mesentery*/diagnostic imaging , Intestine, Small*/pathology , Intestine, Small*/diagnostic imaging, Humans ; Male ; Young Adult ; Proto-Oncogene Proteins B-raf/genetics ; Positron Emission Tomography Computed Tomography ; Mutation ; Treatment Outcome

Secretin targets interstitial cells of Cajal to regulate intestinal contractions.

Autoren: Bartlett AM Blair PJ Sanders KM et al.

Quelle: EMBO reports [EMBO Rep] 2025 Dec; Vol. 26 (23), pp. 6015-6043. Date of Electronic Publication: 2025 Nov 06.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: Nature Publishing Group Country of Publication: England NLM ID: 100963049 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1469-3178 (Electronic) Linking ISSN: 1469221X NLM ISO Abbreviation: EMBO Rep Subsets: MEDLINE

MeSH-Schlagworte: Secretin*/pharmacology , Secretin*/metabolism , Interstitial Cells of Cajal*/metabolism , Interstitial Cells of Cajal*/drug effects , Gastrointestinal Motility*/drug effects , Muscle Contraction*/drug effects , Intestine, Small*/physiology , Intestine, Small*/drug effects, Animals ; Receptors, Gastrointestinal Hormone/metabolism ; Receptors, Gastrointestinal Hormone/genetics ; Receptors, G-Protein-Coupled/metabolism ; Receptors, G-Protein-Coupled/genetics ; Mice ; Cyclic AMP/metabolism ; Calcium/metabolism ; Tetrodotoxin/pharmacology ; Cyclic AMP-Dependent Protein Kinases/metabolism ; Signal Transduction ; Rats

Dyssynergic Defecation Is Associated With Small Intestinal Bacterial Overgrowth.

Autoren: Damianos JA Matar A Halawi H et al.

Quelle: Neurogastroenterology and motility [Neurogastroenterol Motil] 2025 Dec; Vol. 37 (12), pp. e70205. Date of Electronic Publication: 2025 Nov 07.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: Blackwell Scientific Publications Country of Publication: England NLM ID: 9432572 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1365-2982 (Electronic) Linking ISSN: 13501925 NLM ISO Abbreviation: Neurogastroenterol Motil Subsets: MEDLINE

MeSH-Schlagworte: Intestine, Small*/microbiology , Intestine, Small*/physiopathology , Defecation*/physiology , Constipation*/physiopathology , Constipation*/microbiology , Gastrointestinal Microbiome*/physiology , Ataxia*/physiopathology, Humans ; Male ; Female ; Middle Aged ; Retrospective Studies ; Manometry ; Aged ; Adult ; Breath Tests

High-salt diets provoke phosphorus absorption from the small intestine in mice.

Autoren: Yang M You H Ni L et al.

Quelle: Clinical and experimental hypertension (New York, N.Y. : 1993) [Clin Exp Hypertens] 2025 Dec; Vol. 47 (1), pp. 2472066. Date of Electronic Publication: 2025 Feb 25.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: Informa Healthcare Country of Publication: England NLM ID: 9305929 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1525-6006 (Electronic) Linking ISSN: 10641963 NLM ISO Abbreviation: Clin Exp Hypertens Subsets: MEDLINE

MeSH-Schlagworte: Intestinal Absorption*/drug effects , Intestinal Absorption*/physiology , Intestine, Small*/metabolism , Intestine, Small*/drug effects , Phosphorus*/metabolism , Sodium Chloride, Dietary*/pharmacology, Animals ; Male ; Mice, Inbred C57BL ; Mice ; Fibroblast Growth Factor-23 ; Sodium-Hydrogen Exchanger 3/metabolism ; Fibroblast Growth Factors/metabolism ; Kidney/metabolism ; Sodium-Phosphate Cotransporter Proteins, Type IIb/metabolism ; Sodium-Phosphate Cotransporter Proteins, Type IIb/genetics ; Blood Pressure/drug effects

Glutamine: A misunderstood amino acid with therapeutic potential.

Autoren: McMullen MK; Örtspecialisten, Nässjö, Sweden.

Quelle: Nutrition and health [Nutr Health] 2025 Dec; Vol. 31 (4), pp. 1325-1329. Date of Electronic Publication: 2025 Jul 10.

Publikationsart: Journal Article; Review

Info zur Zeitschrift: Publisher: Sage Country of Publication: England NLM ID: 8306569 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 0260-1060 (Print) Linking ISSN: 02601060 NLM ISO Abbreviation: Nutr Health Subsets: MEDLINE

MeSH-Schlagworte: Glutamine*/pharmacokinetics , Glutamine*/administration & dosage , Glutamine*/metabolism , Glutamine*/therapeutic use , Dietary Supplements* , Intestine, Small*/metabolism , Intestine, Small*/drug effects, Humans ; Intestinal Mucosa/metabolism ; Intestinal Mucosa/drug effects ; Amino Acids ; Enterocytes/metabolism ; Permeability ; Animals

Disentangling the impact of obesity, diet, host factors, and microbiota on small intestinal antimicrobial peptide expression.

Autoren: Puértolas-Balint F Prasoodanan P K V Holmberg SM et al.

Quelle: Gut microbes [Gut Microbes] 2025 Dec; Vol. 17 (1), pp. 2536095. Date of Electronic Publication: 2025 Aug 04.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: Taylor & Francis Country of Publication: United States NLM ID: 101495343 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1949-0984 (Electronic) Linking ISSN: 19490976 NLM ISO Abbreviation: Gut Microbes Subsets: MEDLINE

MeSH-Schlagworte: Gastrointestinal Microbiome* , Obesity*/microbiology , Obesity*/metabolism , Intestine, Small*/microbiology , Intestine, Small*/metabolism , Antimicrobial Peptides*/metabolism , Antimicrobial Peptides*/genetics , Antimicrobial Cationic Peptides*/metabolism , Antimicrobial Cationic Peptides*/genetics, Animals ; Mice ; Male ; Female ; Mice, Inbred C57BL ; Intestinal Mucosa/microbiology ; Intestinal Mucosa/metabolism ; Host Microbial Interactions ; Bacteria/classification ; Bacteria/genetics ; Bacteria/isolation & purification ; Diet ; Diet, Western/adverse effects

Single-cell RNA-seq of small-intestinal neuroendocrine tumors reveals the cell of origin and gene expression of early tumor development.

Autoren: Sei Y Forbes J Oguz C et al.

Quelle: Cell reports [Cell Rep] 2025 Nov 25; Vol. 44 (11), pp. 116500. Date of Electronic Publication: 2025 Oct 31.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: Cell Press Country of Publication: United States NLM ID: 101573691 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2211-1247 (Electronic) NLM ISO Abbreviation: Cell Rep Subsets: MEDLINE

MeSH-Schlagworte: Neuroendocrine Tumors*/genetics , Neuroendocrine Tumors*/pathology , Neuroendocrine Tumors*/metabolism , Single-Cell Analysis*/methods , Gene Expression Regulation, Neoplastic* , Intestinal Neoplasms*/genetics , Intestinal Neoplasms*/pathology , RNA-Seq* , Intestine, Small*/pathology , Intestine, Small*/metabolism , Carcinogenesis*/genetics , Carcinogenesis*/pathology, Humans ; Male ; Single-Cell Gene Expression Analysis

3D bioprinted human-scale intestine models for physiological and microbial insights through fluid-driven heterogeneity.

Autoren: Gao Z Du H Yu S et al.

Quelle: Science advances [Sci Adv] 2025 Nov 21; Vol. 11 (47), pp. eady6562. Date of Electronic Publication: 2025 Nov 21.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 101653440 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2375-2548 (Electronic) Linking ISSN: 23752548 NLM ISO Abbreviation: Sci Adv Subsets: MEDLINE

MeSH-Schlagworte: Bioprinting*/methods , Printing, Three-Dimensional* , Models, Biological* , Intestinal Mucosa*/metabolism , Intestinal Mucosa*/microbiology , Intestine, Small*/physiology , Intestine, Small*/microbiology, Humans ; Lactobacillus plantarum/physiology ; Tissue Engineering

Subcutaneous white adipose tissue-derived extracellular vesicles maintain intestinal homeostasis via IgA biosynthesis in aging mice.

Autoren: Long K Liu P Wang Y et al.

Quelle: The Journal of clinical investigation [J Clin Invest] 2025 Nov 17; Vol. 135 (22). Date of Electronic Publication: 2025 Nov 17 (Print Publication: 2025).

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: American Society for Clinical Investigation Country of Publication: United States NLM ID: 7802877 Publication Model: eCollection Cited Medium: Internet ISSN: 1558-8238 (Electronic) Linking ISSN: 00219738 NLM ISO Abbreviation: J Clin Invest Subsets: MEDLINE

MeSH-Schlagworte: Extracellular Vesicles*/immunology , Extracellular Vesicles*/metabolism , Immunoglobulin A*/biosynthesis , Immunoglobulin A*/immunology , Aging*/immunology , Aging*/pathology , Adipose Tissue, White*/immunology , Adipose Tissue, White*/metabolism , Adipose Tissue, White*/pathology , Homeostasis* , Gastrointestinal Microbiome*/immunology , Intestinal Mucosa*/metabolism , Intestinal Mucosa*/immunology , Subcutaneous Fat*/immunology , Subcutaneous Fat*/metabolism , Intestine, Small*/immunology , Intestine, Small*/metabolism, Animals ; Mice ; Male ; Tretinoin/metabolism ; Mice, Inbred C57BL

Tannic acid decreased the synthesis and secretion of sIgA in the small intestine of Brandt's voles (Lasiopodomys brandtii) by modifying gut microbiota.

Autoren: Gu M Peng X Dai X et al.

Quelle: Biochemical and biophysical research communications [Biochem Biophys Res Commun] 2025 Nov 14; Vol. 789, pp. 152846. Date of Electronic Publication: 2025 Oct 22.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: Elsevier Country of Publication: United States NLM ID: 0372516 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1090-2104 (Electronic) Linking ISSN: 0006291X NLM ISO Abbreviation: Biochem Biophys Res Commun Subsets: MEDLINE

MeSH-Schlagworte: Gastrointestinal Microbiome*/drug effects , Arvicolinae*/microbiology , Arvicolinae*/immunology , Intestine, Small*/drug effects , Intestine, Small*/microbiology , Intestine, Small*/metabolism , Intestine, Small*/immunology , Tannins*/pharmacology , Immunoglobulin A, Secretory*/metabolism , Immunoglobulin A, Secretory*/biosynthesis, Animals ; Male ; Fecal Microbiota Transplantation ; Polyphenols

Capsule endoscopy findings following negative second look endoscopy in patients with suspected small bowel bleeding at a tertiary care center in Sri Lanka.

Autoren: Aponso T Wanninayake WMDAS Nawarathne NMM et al.

Quelle: BMC gastroenterology [BMC Gastroenterol] 2025 Nov 10; Vol. 25 (1), pp. 793. Date of Electronic Publication: 2025 Nov 10.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: BioMed Central Country of Publication: England NLM ID: 100968547 Publication Model: Electronic Cited Medium: Internet ISSN: 1471-230X (Electronic) Linking ISSN: 1471230X NLM ISO Abbreviation: BMC Gastroenterol Subsets: MEDLINE

MeSH-Schlagworte: Capsule Endoscopy* , Gastrointestinal Hemorrhage*/diagnostic imaging , Gastrointestinal Hemorrhage*/etiology , Gastrointestinal Hemorrhage*/diagnosis , Intestine, Small*/diagnostic imaging , Intestine, Small*/pathology, Humans ; Male ; Female ; Sri Lanka ; Middle Aged ; Retrospective Studies ; Cross-Sectional Studies ; Tertiary Care Centers ; Adult ; Aged

From obstruction to ischaemia: a systematic review and meta-analysis on the diagnostic accuracy of CT scans in identifying small and large bowel obstruction, underlying causes and predicting critical complications in adults.

Autoren: Ahmad SJS Drvaric I Ahmed AR et al.

Quelle: BMJ open [BMJ Open] 2025 Nov 04; Vol. 15 (11), pp. e103887. Date of Electronic Publication: 2025 Nov 04.

Publikationsart: Journal Article; Systematic Review; Meta-Analysis

Info zur Zeitschrift: Publisher: BMJ Publishing Group Ltd Country of Publication: England NLM ID: 101552874 Publication Model: Electronic Cited Medium: Internet ISSN: 2044-6055 (Electronic) Linking ISSN: 20446055 NLM ISO Abbreviation: BMJ Open Subsets: MEDLINE

MeSH-Schlagworte: Intestinal Obstruction*/diagnostic imaging , Intestinal Obstruction*/complications , Intestinal Obstruction*/etiology , Tomography, X-Ray Computed* , Ischemia*/diagnostic imaging , Ischemia*/complications , Ischemia*/etiology , Intestine, Small*/diagnostic imaging , Intestine, Small*/blood supply , Intestine, Large*/diagnostic imaging , Intestine, Large*/blood supply, Humans ; Sensitivity and Specificity ; Adult ; Predictive Value of Tests

Small Intestine Neuromuscular Dysfunctions and Neurogliopathy in a Mouse Model of High-Fat Diet-Induced Obesity: Involvement of Toll-Like Receptor 4.

Autoren: Faggin S Cerantola S Bosi A et al.

Quelle: International journal of molecular sciences [Int J Mol Sci] 2025 Nov 03; Vol. 26 (21). Date of Electronic Publication: 2025 Nov 03.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: MDPI Country of Publication: Switzerland NLM ID: 101092791 Publication Model: Electronic Cited Medium: Internet ISSN: 1422-0067 (Electronic) Linking ISSN: 14220067 NLM ISO Abbreviation: Int J Mol Sci Subsets: MEDLINE

MeSH-Schlagworte: Toll-Like Receptor 4*/metabolism , Toll-Like Receptor 4*/genetics , Diet, High-Fat*/adverse effects , Obesity*/metabolism , Obesity*/etiology , Obesity*/physiopathology , Obesity*/pathology , Intestine, Small*/physiopathology , Intestine, Small*/metabolism , Intestine, Small*/pathology , Intestine, Small*/innervation , Neuroglia*/metabolism , Neuroglia*/pathology, Animals ; Mice ; Male ; Disease Models, Animal ; Mice, Inbred C57BL ; Enteric Nervous System/metabolism ; Enteric Nervous System/physiopathology ; Enteric Nervous System/pathology ; Gastrointestinal Motility ; Mice, Knockout ; Myenteric Plexus/metabolism ; Myenteric Plexus/pathology

Integrated laser speckle contrast and multispectral imaging for in vivo multimodal assessment of small intestinal viability.

Autoren: Xie Y Huang D Yan J et al.

Quelle: Journal of photochemistry and photobiology. B, Biology [J Photochem Photobiol B] 2025 Nov; Vol. 272, pp. 113264. Date of Electronic Publication: 2025 Sep 11.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: Elsevier Sequoia Country of Publication: Switzerland NLM ID: 8804966 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-2682 (Electronic) Linking ISSN: 10111344 NLM ISO Abbreviation: J Photochem Photobiol B Subsets: MEDLINE

MeSH-Schlagworte: Intestine, Small*/pathology , Intestine, Small*/blood supply , Intestine, Small*/diagnostic imaging , Intestine, Small*/metabolism , Laser Speckle Contrast Imaging*/methods , Multimodal Imaging*, Animals ; Rabbits ; Oxygen/metabolism ; Necrosis ; Male ; Reperfusion Injury/diagnostic imaging ; Reperfusion Injury/pathology ; Oxygen Saturation

Crohn Disease Strictures: Multimodality Imaging to Identify Imaging Biomarkers.

Autoren: Hoodeshenas S Dillman JR Taylor SA et al.

Quelle: Radiographics : a review publication of the Radiological Society of North America, Inc [Radiographics] 2025 Nov; Vol. 45 (11), pp. e240226.

Publikationsart: Journal Article; Review

Info zur Zeitschrift: Publisher: Radiological Society of North America Country of Publication: United States NLM ID: 8302501 Publication Model: Print Cited Medium: Internet ISSN: 1527-1323 (Electronic) Linking ISSN: 02715333 NLM ISO Abbreviation: Radiographics Subsets: MEDLINE

MeSH-Schlagworte: Crohn Disease*/diagnostic imaging , Crohn Disease*/complications , Crohn Disease*/pathology , Multimodal Imaging*/methods , Intestine, Small*/diagnostic imaging , Intestine, Small*/pathology , Intestinal Obstruction*/diagnostic imaging , Intestinal Obstruction*/etiology, Humans ; Constriction, Pathologic/diagnostic imaging ; Constriction, Pathologic/etiology ; Biomarkers ; Magnetic Resonance Imaging/methods ; Tomography, X-Ray Computed/methods ; Ultrasonography

Early posthatch feeding influences small intestine development in broiler chickens.

Autoren: Gaweł A Bobrek K Madej JP

Quelle: Poultry science [Poult Sci] 2025 Nov; Vol. 104 (11), pp. 105861. Date of Electronic Publication: 2025 Sep 18.

Publikationsart: Journal Article

Info zur Zeitschrift: Publisher: Elsevier Country of Publication: England NLM ID: 0401150 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1525-3171 (Electronic) Linking ISSN: 00325791 NLM ISO Abbreviation: Poult Sci Subsets: MEDLINE

MeSH-Schlagworte: Chickens*/growth & development , Chickens*/physiology , Intestine, Small*/growth & development , Intestine, Small*/anatomy & histology , Animal Husbandry*/methods, Animals