(b) Fill in the blanks to complete the passage:-
The stomach is an elastic bag located below the (i)-----
Its walls are highly
-------- and churn the food thoroughly to mix with the (iii)
secreted by
the inner lining. The opening of stomach into the (iv)------ is called (v)------
It has rings of muscles called(vi)----
to keep the opening closed like a valve. A
similar sphincter termed (vii)
-sphincter is present at the front end to prevent
back flow of food into (viii).
The food stays in the stomach for about
(ix)---------- hours and attains a pulp like form called the (x)-----
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