[["Generally, the smaller the mammal, the faster its heart beats. The heartbeat of a house mouse is about 700 beats per minute, that's almost 12 beats per second!", 68.0], ["The heartbeat of a house mouse is about 700 beats per minute. That's 12 times per second. And if you think that's fast, look at a shrew. Their hearts beat about 20 times each second.", 53.0]]
how many times does a mouse's heart beat per second
animals