3 ms·
and the highest heart rate belongs to the smallest mammal https://en.wikipedia.org/wiki/Etruscan_shrew https://en.wikipedia.org/wiki/Etruscan_shrew "The Etrus
by trhway 8mo ago
and the highest heart rate belongs to the smallest mammal
https://en.wikipedia.org/wiki/Etruscan_shrew https://en.wikipedia.org/wiki/Etruscan_shrew
"The Etruscan shrew has a very fast heart beating rate, up to 1511 beats/min (25 beats/s) and a relatively large heart muscle mass, 1.2% of body weight."
(to illustrate - machine guns typically do 600-900 rounds/min)
I wonder whose muscle fiber is stronger per unit mass - the whale's or the shrew's...
- MadnessASAP 8mo agoWhile not being particularly knowledgeable in such things, I would presume the shrews. A whales muscle needs to optimise for efficiency and oxygen storage to allow for extended deep dives and continuous use. Compared to a shrew whose muscles would favour compact size, low mass, and fast reactions to permit quick getaways.