A heart beats 68 times a minute. How many times does it beat in a day? …
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A heart beats times a minute. How many times does it beat in a day? About how many times in years? Use days in a year.
Need a reminder? The key ideaShow
Skeletal muscle: striped, voluntary. Smooth: not striped, involuntary. Cardiac: striped, branched, involuntary. Neurons: dendrites receive, the axon carries the message away.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. A day. beats.
Step 2. 80 years. beats.
Answer: beats a day; nearly 3 billion in 80 years. Cardiac muscle never tires.
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