In honor of Valentine’s Day I thought I would do a mini post about the hearts of the animal world so here are some interesting facts:
Hummingbird hearts average 1000 beats per minute (bpm), which is six beats per second! The human heart has an average bpm of 60 to 100.
Cheetahs have a normal heart rate of 120 bpm but it can raise to 250 bpm when running.
Giraffes have the highest average blood pressure of any mammal (280/180mm mercury), also their heart weighs about 12Kg(26.5lbs). This all helps to combat gravity and push the blood all the way up their necks. I wonder if they have anxiety blood pressure spikes?
A blue whale has a heart the size of a car, it weighs 589.7Kg(1300lbs) and pumps 7 tons of blood. The arteries connected to the heart are so large a human baby could crawl through them! That is huge!
Octopuses have 3 hearts, which is why they are such good huggers! [Yes, octopuses is an acceptable plural of octopus. There are also octopi and octopodes.
Dogs have the largest heart to body mass ratio of all mammals which makes sense as dogs are so loveable.
Zebrafish can regenerate their hearts! It is hard to understand how they can go without the heart for it to regenerate, maybe I’ll have to do a full post on this one as it sounds so cool!
And of course, Timelords have two...
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