Question

Explain the process of digestion in the buccal cavity with a note on the arrangement of teeth​

Answer 1

Answer:

In the oral cavity, food is chewed so that it can change into a semisolid paste. Saliva is mixed with food. Saliva helps in making the food particles into a bolus. Saliva makes it easier to swallow the food. It can be said that oral cavity performs the function of masticating the food and swallowing the food. Moreover, salivary amylase in saliva digests starch. Starch is converted into maltose during this process. 

StarchSalitory AmylasepH 6.8Maltose

Arrangement of Teeth: In human beings, each tooth is embedded in a socket of jaw bone. This type of attachment of teeth is called the Thecodont. Human beings get two sets of teeth in their lifetime, i.e. temporary teeth and permanent teeth. Temporary teeth or milk teeth are deciduous and are replaced by permanent teeth. This type of arrangement is diphyodont. 

There are four types of teeth in human beings, viz. incisors, canines, premolars and molars. They are represented as I, C, PM and M in short. Each half of a jaw contains certain number of each type of teeth. This can be shown by following dental formula: 

2123/2123

This shows that there are 2 incisors for cutting, I canine for tearing, 2 premolars and 3 molars teeth for grinding and crushing in each half of a jaw. Thus, there are 32 teeth in a human adult

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Answer 2

Answer:

The buccal cavity performs two major functions i.e., mastication of food and facilitation of swallowing

Firstly, food gets mixed with saliva which softens and lubricates the food and cheuring process breaks the food into smaller pieces.

Buccal cavity is also involved in the digestion of same food components.

Digestion of carbohydrates starts in the buccal cavity. The food is mixed with saliva which contains salivary anylase. The enzyme converts starch into maltose, isomaltose and α-dextrins. 30% of the starch in food is hydrolysed in the buccal cavity.

Starch−→−−−anylaseSalivanyMaltose+Isomaltose+α−dextrins

Saliva do not any protein or fat digesting anzyme. Therefore, their digestion do not occur in the oral cavity.

The oral cavity has a number of teeth and a muscular tongue. Each tooth is embedded in a socket of jaw bone.

This type of attachement is called thecodont. The human have two sets of teeth a temporary and a permanent. This type of denotation is called diphyodont. The arrangement of teeth is illustrated below.

Explanation:

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