On closer study it is found that pancreatic secretion consists of two phases: 1. Nervous Phase 2. Chemical Phase. 1. Nervous Phase: Pancreatic secretion starts 1—2 minutes after taking food. When the vagi are cut, the secretion is abolished. This proves that the initial phase of pancreatic secretion is a reflex response. The stimulus for this reflex arises in the [...]
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 [...]
In this article we will discuss about the structure of salivary glands of human with its suitable diagram. Secretory unit of salivary gland is an acinus. There are two types of acini in the salivary glands namely serous and mucous type. Parotid gland is mostly made up of serous type, sublingual is predominantly mucous type, sub-mandibular is both, but more [...]