
Grade 12th pass7 grade science
The contraction of heart is known as:-
A. Systole
B. Diastole
C. SA node
D. None of the above.
The contraction of heart is known as:-
A. Systole
B. Diastole
C. SA node
D. None of the above.



Explain the term conduction, convection, and radiation with examples.
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