Ingestion is the taking of food into the mouth. Ingestion is the first stage of the digestive process.

What is mastication, and why is it an example of physical digestion?

Mastication is the chewing of food by the teeth. Chewing breaks food into smaller pieces without changing it chemically, which increases its surface area for enzymes.

What are the functions of the incisors and canines?

The incisors are sharp, chisel-shaped front teeth that cut and bite food. The canines are pointed teeth that grip and tear food.

What are the functions of the premolars and molars?

The premolars crush and grind food. The molars have broad, ridged surfaces for grinding food into small pieces.

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Oral Health and Dentistry

Ingestion, teeth and digestion in the mouth

3 things to know
A2 7

Overview

Ingestion and forming a bolus, mastication, incisors, canines, premolars and molars, salivary amylase and lingual lipase, haptocorrin, and oral bacteria converting nitrate to nitrite.

What you need to know

Answer each one before you reveal it.

Your recallNot started

Key term

Why is the mouth important as the first part of the gastrointestinal tract?

Key term

What is ingestion?

Process

How is a food bolus formed and swallowed?

Questions from this subtopic

Each one with the model answer underneath.

1
Why is the mouth important as the first part of the gastrointestinal tract?
Model answer
The mouth takes in food and begins both physical and chemical digestion. Food leaves the mouth as a soft bolus that is easy to swallow.
2
What is ingestion?
Model answer
Ingestion is the taking of food into the mouth. Ingestion is the first stage of the digestive process.
3
How is a food bolus formed and swallowed?
Model answer
Teeth chew the food while saliva and mucus soften and bind it into a soft ball. The tongue pushes the bolus back, and it passes through the pharynx and oesophagus to the stomach.
4
What is mastication, and why is it an example of physical digestion?
Model answer
Mastication is the chewing of food by the teeth. Chewing breaks food into smaller pieces without changing it chemically, which increases its surface area for enzymes.
5
What are the functions of the incisors and canines?
Model answer
The incisors are sharp, chisel-shaped front teeth that cut and bite food. The canines are pointed teeth that grip and tear food.
6
What are the functions of the premolars and molars?
Model answer
The premolars crush and grind food. The molars have broad, ridged surfaces for grinding food into small pieces.

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