Yes. I believe all mammals do.
pump blood you a******
4
650 min
Above the heart
The average heart weight of a rat typically ranges from about 1.5 to 2 grams, depending on the rat's size and age. This small size reflects their overall body weight, which is generally around 200 to 500 grams for an adult rat. Factors such as genetics, diet, and health can also influence heart weight in individual rats.
a rat's heart beat is almost fast enough so you can't tell one from the other. veeeeeeeery fast.
they dont have one
Basically, yes. IF you get your heart rat up you will use more calories.
Well basicly because the elephant has no preditors so elephants are usually calm and so have a low heart rate,but a rat has to be fast and have faster reactions and so they have a faster heart rate.
to improve alertness
to pump blood around the rat's body
It has four just like any mammal including humans. Research this stuff yourself you unintelligent loser!