Digestion starts in the __________

Mouth

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Oesophagus

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Stomach

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Small intestine

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Solution

The correct option is A
Mouth

Digestion starts from the moment we put food in our mouth. Here, large chunks of food are broken down into smaller particles by the action of our teeth. This is called mechanical digestion. Along with this, food in the mouth also gets mixed with saliva. Saliva contains an enzyme called 'salivary amylase' which starts the process of chemical digestion. It acts on starch and breaks it down to maltose. Chemical digestion i.e. the action of enzymes continue as food moves down the digestive tract.

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Similar questions

Which of the following is the correct sequence of parts as they occur in the human alimentary canal ?

(a) Mouth $\to$ Stomach $\to$ Small intestine $\to$ Oesophagus $\to$ Large intestine
(b) Mouth $\to$ Oesophagus $\to$ Stomach $\to$ Large intestine $\to$ Small intestine
(c) Mouth $\to$ Stomach $\to$ Oesophagus $\to$ Small intestine $\to$ Large intestine
(d) Mouth $\to$ Oesophagus $\to$ Stomach $\to$ Small intestine $\to$ Large intestine

Q. Where are proteins first digested in the alimentary canal?
(a) small intestine
(b) oesophagus
(c) mouth
(d) stomach

Question 4
Which is the correct sequence of parts in a human alimentary canal?

(a) $M o u t h \to s t o m a c h \to s m a l l i n t e s t i n e \to o e s o p h a g u s \to l a r g e i n t e s t i n e$
(b) $M o u t h \to o e s o p h a g u s \to s t o m a c h \to l a r g e i n t e s t i n e \to s m a l l i n t e s t i n e$
(c) $M o u t h \to s t o m a c h \to o e s o p h a g u s \to s m a l l i n t e s t i n e \to l a r g e i n t e s t i n e$
(d) $M o u t h \to o e s o p h a g u s \to s t o m a c h \to s m a l l i n t e s t i n e \to l a r g e i n t e s t i n e$

The process of digestion in humans is completed in :
(a) oesophagus (b) small intestine(c) stomach (d) large intestine

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