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NCERT Exemplar Solutions Class 7 Science Solutions for Transportation in Animals and Plants - Exercise in Chapter 11 - Transportation in Animals and Plants
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(a) Name the only artery that carries carbon dioxide-rich blood.
(b) Why is it called an artery if it does not carry oxygen-rich blood?
Answer:
a) Pulmonary artery
b) It is called as artery because it carries blood away from the heart.
Video transcript
"hello everyone welcome to lito this is
priya
and here we have a question about
isotopes of hydrogen
so let us look into the question for the
symbol of hydrogen
t h d and t tabulate
three subatomic particles found in each
of them
so these h d and t are the isotopes
which means
they have same atomic number but their
number of neutrons will be different in
that
atoms so let us look into the symbol
of these h d p h means
hydrogen d means deuterium and t means
tritium
and the symbol of hydrogen is h
symbol of deuterium is b
and symbol of tritium is
t and mass of these
three isotopes are one
two and three
and atomic atomic number
of these atoms
are 1 1
1 so number of electrons
present in these atoms are also 1
1 1 and number of protons present in
these
atoms are again one one
and one but there will be only change in
the number of neutrons
so the number of neutron is zero
one and two because of this the mass of
these three
isotopes have changed hydrogen is fun
deuterium is two and tritium is three
because they have different
number of neutrons and their mass has
changed
so this is about the subatomic particles
present in
hdnt hope you understand this video if
you like my video please subscribe to
our little channel
and if you have any doubts you can leave
a message in comment box thank you"
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