Subject :NSO Class : Class 5
The heart is made up of muscle tissue. However, the
tissue in the heart is different from the tissue in the
leg. Infer the reason for the difference.
A The heart must beat all the time, so its tissue should
be able to contract and relax continuously without
getting tired.
B The leg is much larger than the heart, so the tissue
in the leg muscle needs to contain larger cells.
C A person can voluntarily control contraction of
heart muscles but not leg muscles.
D The heart muscle is surrounded by blood vessels,
so the blood makes it look different from the leg
muscle.
Ans 1:
Class : Class 5
OF COURSE ITS A
Ans 2:
Class : Class 7
Answer is A because the heart has cardiac muscles that comes in involuntary muscles work on their own and they continue to beat without stopping . Unlike involuntary muscles like muscles in legs , arms etc. work on signals given by brain