During the journey of food from mouth to stomach through oesophagus. How muscular system coordinate in this process?

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Solution

The circular muscles of the mouth enable the food to be pushed into the oral cavity and to be moved around.
During mastication, the surface muscles help in the chewing and biting actions. Thus, the muscles of the mouth enable the food to push into the oral cavity and to be moved around.
The wall of the oesophagus is made up of two kinds of smooth muscles - i) Circular muscles and ii) Longitudinal muscles.
Contraction of the circular muscles results in narrowing of the oesophagus just behind the bolus. So, the food is squeezed downwards
Contraction of the longitudinal muscles in front of the bolus widen the tube, this results in shortening of the particular part of the oesophagus.
Contraction and relaxation of these muscles dring in a wave-like motion that propels the food bolus into the stomach by the action called “peristalsis”.

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Q. The rhythmic muscular contraction that pushes food from the oesophagus into the stomach is called _______.

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

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. Identify the muscular organ of the digestive system which receives food from the oesophagus.

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