11. Extra pounds can stress the cardiovascular system, gastrointestinal tract , liver and kidneys. 12. Methylparaben is readily absorbed from the gastrointestinal tract or through the skin. 13. The gastrointestinal tract contains thousands of different bacteria in their gut flora. 14. For example, oesophagogastroduodenoscopy is trailed via Examination Gastrointestinal Tract Upper Endoscopic Fibreoptic. 15. The mistletoesbird s modified gastrointestinal tract is in the same plane. 16. Basolateral membrane HCO 3 " transport in the gastrointestinal tract . 17. Fenbendazole is poorly absorbed from the gastrointestinal tract in most species. 18. But theory goes it should not enter your circulation from the gastrointestinal tract . 19. Normally the human gastrointestinal tract digests and absorbs dietary nutrients with remarkable efficiency. 20. This motility problem results from atrophy of the gastrointestinal tract wall smooth muscle.