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Engineering HSC and IIT-JEE Mains and
advanced videos. Hello students today we
are starting chapter human nutrition in
that we are studying topic peristalsis
today we'll be studying how contraction
and relaxation takes place in stock.
Peristalsis whenever you eat food and
food is chewed very properly in your
mouth a buccal cavity next the food
moves down to your throat and inside
throat that is esofamous or you can
say the food now inside this is so
figures just to push down food further
if your figures is basically a round
pipe there is a moment of contraction
and relaxation taking place inside
esophagus this moment of contraction and
relaxation is nothing but  called as
peristalsis and this peristaltic
movement helps to push food in downward
directions you can say peristalsis is
nothing but a little bit wave of
contraction and relaxation in a tubular
organ in this case it is esophagus to
just move down for
peristalsis or you can say that downward
contraction and relaxation movement just
to push food predecessor is nothing but
a rhythmic wave of contraction and
relaxation that is contraction happens
and the relaxation happens in the pipe
of esophagus or foot pipe which helps
the food to move in downward direction
an example of pen stances could be your
elementary canal that conducts food from
the esophagus who anus is to do
peristaltic movement also the lining of
internal organs cilia which is like
brush like borders present inside small
intestine and large intestine help in
the peristaltic moment another example
of fantastic moment would be the
duration of vomiting which is nothing
but reverse peristaltic spot mode or it
gives spasmodic peristalsis now it is
called a syllabus fax modality that is
stances because during this process
waste materials in the form of water
comes out students in this part of the
chapter we have started about what is
peristalsis what is that process through
which foot can be move down in stomach
even though there is a pipe length
object which is eco so ped is present in
your stomach and this process of
peristalsis can only take place because
your ISO fable pipe or your food pipe is
muscle based we all have seen in a
childhood if you have to put water in a
pipe is just long and hollow or some
solid metal in that long and hollow pipe
then you have to push that pipe outward
and downward that is peristalsis I hope
you're not clear about this concept
thank you
