Gastric secretion has divided into four phases: 1. Nervous Phase 2. Gastric Phase 3. Intestinal Phase 4. Interdigestive Phase. 1. Nervous Phase: A pouch of Pavlov is prepared in a dog and upon the same animal oesophagus is divided, as done in the experiment of sham feeding. The food, swallowed by the animal, comes out through the cut end of [...]
In this essay we will discuss about the digestive system in humans. After reading this essay you will learn about:- 1. Organs of Digestive System 2. Accessory Glands for Digestion of Foods. Essay # 1. Organs of Digestive System: Digestion means simplification of complex foods. It is the process of breaking various foodstuff into simple products. The complex foods like [...]
The following points highlight the three important stages of swallowing. The stages are: 1. Buccal or Oral Stage 2. Pharyngeal Stage 3. Esophageal Stage. 1. Buccal or Oral Stage: By the action of tongue, and muscles contracting against the palate, the food is converted into bolus which is lubricated by saliva. The bolus is then pushed by the tongue to [...]