NCERT Exemplar Solutions Class 7 Science Solutions for Transportation in Animals and Plants - Exercise in Chapter 11 - Transportation in Animals and Plants

Question 10 Transportation in Animals and Plants - Exercise

What is the special feature present in a human heart which does not allow mixing of blood when oxygen-rich and carbon dioxide-rich blood reach the heart?


The human heart is four-chambered hence oxygen-rich and carbon dioxide-rich will not mix when blood reaches the heart.

Video transcript
"hello everyone welcome to later this is priya and here we have a question about the nucleus of atom so let us look into the question composition of the nuclei of two atomic species x and y are given as under so protons of x are six and protons of y are six neutrons of x are six and protons of x y are eight so give the mass numbers of x and y what is the relation between the two species so here to find out the mass numbers of x and y we have a formula that mass of number mass number of x is protons plus neutrons so we know that in x we have six protons and 6 neutrons so 6 plus 6 it gives 12 and coming to the mass number of y is again proton plus neutron which is 6 plus 8 6 plus 8 equal to 14 so they are the same elements as their atomic numbers are the same they are isotopes as they differ in the number of neutrons and hence their mass numbers are different so the coming to the relation of this x and y so both these atoms atom x and atom phi have same atomic number so they belong to the same atoms but coming to their atomic mass they have different atomic mass so that these two atoms are iso bars sorry these two atoms are isotopes because they have same atomic number but different months okay so hope you understand this video if you like my video please subscribe to our leader channel and if you have any doubts keep a message in comment box thank you "
Connect with us on social media!
2022 © Quality Tutorials Pvt Ltd All rights reserved