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 [...]
In this article we will discuss about the structure of gastric mucosa. The gastric mucosa is normally covered by a thick layer of mucous. Once this layer is removed, one can make out a number of pores known as gastric pits. Each pit is the out let for 3-7 gastric glands (Fig. 5.10). The gastric glands are tubular glands which [...]