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Engineering HSC and IIT-JEE Mains and
advanced videos. Hello Student today we are studying
chapter human respiration in that we are
studying topic character of respiratory
system now I talk about human
respiratory system it needs to be in
certain parameters or it means to have
certain vegetables and other organs then
only we as human beings can be properly
now what are these parameters or
features let's study about them.
firstly and in espírito surface or area
has to be thin and permeable now when I
thik and  permeable let's assume
that angular other air sacs now imagine
if you Angela all your insects with
thick and impermeable do you think that
the gaseous exchange of oxygen and
carbon dioxide would have been possible
obviously not it won't be secondly large
surface area if you imagine your
respiratory tract your respiratory tract
eventually starts from your nostrils or
noses including your right and the left
cavity of a moose and then goes from
there till your alveoli in that you have
pharynx larynx esophagus bronchi so it's
quite a big area obviously you have to
inhale and exhale gases and it is a
lifelong process and while you can some
gases and needing large amount of spaces
moist and highly vascular now
respiratory systems need to be moist and
they have to be vascular especially in
eukaryotic organisms because prokaryotic
organisms will never have so advanced
respiratory system they basically
address fire with the help of the skin
or outer layers of skin or cutaneous or
subcutaneous layers of skin they will be
in direct or million in direct contact
with the source of oxygen now we are
inhaling air or gases atmosphere or
environment just to intake that oxygen
which is vital for our survival so we
need to be around oxygen obviously on we
have to exhale oxygen and we need to get
oxygen in assistance and we have to
remove carbon dioxide out of our systems
lastly the presence of respiratory
pigments hemoglobin
if there is no hemoglobin who will carry
oxygen molecule to different tissues
so what are the characteristics that
would be needed for a respiratory system
to work properly on to carry on that
gaseous exchange of material let's go
through them firstly it must be thin and
permeable permeability of your eye will
attract all your respiratory system is
there necessary because it's that's not
resin how will your gases exchange also
it should have a large surface area the
next interest subtract cannot be a
smaller area then how gaseous exchange
how would the gases molecules which
would include oxygen carbon dioxide if
you inhale it would also include dust
particles nitrogen where are they going
to reside or stay for a pillar of them
till oxygen is kept inside the body and
carbon dioxide is removed
also it needs to be moist and highly
vascular now in prokaryotes or in
vertical organisms this is the
requirement which is very necessary they
must be in direct or indirect contact
with the source of oxygen or o2 wherever
your breathing or inspiring that air it
needs to have the presence of oxygen
because that's the thing for which
you're breathing the vital energy
molecule and lastly there needs to be a
presence of respiratory equipment which
is HV or hemoglobin we all know that
oxygen when it has to be carried to
different organs hemoglobin molecule is
a crucial one your RBC's which are
biconcave or enucleated
on that molecule of hemoglobin which is
upon firing ring of ions
attaches and to which the oxygen
molecule attaches and they travel
together so whenever they have to keep
an oxygen molecule this trial travels
together and the oxygen molecules are
distributed to the places of tissues
organs and cells so in google be
necessary now
tense of hemoglobin also the presence of
carbonic anhydrase in the case of human
beings to remove out there are the c
molecules it's not necessary that just
an ma globin or just the carbonic
anhydrase can remove or take in oxygen
to the synthesis certain amount of
and carbon oxide removal is done by
plasma cells of a blank but that's just
seven to eight percent rest of the work
is done by these two parameters so
students in this part of the chapter who
read it studied about the
characteristics of respiratory surfaces
now in case of animals this
characteristics could be for example in
the case of frogs which is an amphibian
this is a Terran animal that keel is
half the time on land and have a big fan
underwater now there is pile with the
help of their gills as well with the
help of this skin now when they respect
the help of their kids they're less
filtrate system should have all this
quality but when there is filed with the
help of this kid the subcutaneous
surface or the skin lesions must contain
this property
similarly lizards not lizards at Ellis
show they're never aquatic but in that
time they need to produce certain
hormones I can because if I could say
along with this system protozoans ma
buds annelids autoimmune leeches a every
expletive system needs to have this
quality so that there is fire
efficiently students in this part of the
chapter we did study about respiratory
system of surfaces and how do they
function and what are their properties
they need to possess to be a fine
desperate resistance I hope they are
very clear about this concept thank you
