Nutrition In Human Beings Video Lecture - Class 10

nutrition in human-beings the process of
nutrition in human-beings is called as
digestion human-beings consists of
specialized organs for the process of
digestion called as digestive system
digestive system includes elementary
canal and digestive glands elementary
can all start from mouth to anus mouth
mouth is the first part of the
elementary canal the taking of food
through the mouth is called ingestion
when food enters into the mouth a
complex food is crushed with the help of
teeth and muscular tongue into small
particles this process is called chewing
saliva secreted from saliva glands into
buccal cavity the crushed food forms
into a soft bolus with the help of
saliva saliva contains an enzyme called
salivary amylase that broken down starch
into sugar now partially digested food
enters into digestive canal it has a
lining of muscles which helps to push
the food forward this moment is called
peristaltic movement also faggus the
food enters from the mouth into stomach
through foot pipe or also faggus stomach
the stomach is a large muscular hollow
part which expands when food enters into
it
the muscular walls of the stomach help
in mixing of food with digestive juices
or enzymes gastric glands present in the
walls of the stomach which released HCl
hydrochloric acid mucus and digesting
enzyme called pepsin the mucus products
in the lining of stomach from action of
acid under normal condition the HCL
creates an acidic medium which
facilitate the action of pepsin small
intestine the exit of food from the
stomach regulated by as pink term
muscles which
is a small amount of food into small
intestine small intestine is the largest
part and coiling the digestion of
carbohydrates proteins and fats occurs
in small intestine facts are in the form
of large globule so it is difficult to
break down
hence bile juices secreted from liver it
consists bile salts which break down
fats into small globules which increase
the efficiency of enzyme action
pancreatic juice secretes from pancreas
which contains enzyme like trypsin and
lipase proteins are breakdown with the
help of trypsin and Li pays for break
down emulsified fats the walls of small
intestine secrete intestinal juices
which finally digests proteins into
amino acid carbohydrates converted into
glucose fats converted into fatty acids
and glycerol in stomach form is acidic
in nature due to combined with HCL so
it's neutralized to alkylene with the
help of pancreatic enzyme now the
digested food is absorbed by walls of
intestinal absorption in small intestine
the inner layer of small intestine
consists of numerous finger like
projections called villi which increase
surface area of absorption these arveleï
are richly supplied with blood vessels
which supplies absorb food to each and
every cell of the body the absorb food
is utilized for obtaining energy
building up new issues and repair of old
tissues large intestine the unabsorbed
food is sent into large intestine the
large intestine also consists of Willey
which absorbs water from unabsorbed food
the remaining unabsorbed material which
is called as faeces is removed from the
body through anis the exit of faeces is
regulated by animals Pinker