Slowest heartbeat

By | 2017-10-13T16:32:44+00:00 May 22, 2017|Biology, Records|

Slowest heartbeat

Last updated: October 13, 2017 at 16:32 pm

The narwhal (Monodon monoceros) can slow its heart to as little as 4 beats per minute during a dive. A study published in 2014 revealed significant changes in heart rate when alternating solutions of high-salt and fresh water are exposed to the Narwhal’s external tusk surface. The narwhal’s tusk is also the world’s most sensitive tooth.

SOURCE:
Nweeia, M. T., Eichmiller, F. C., Hauschka, P. V., Donahue, G. A., Orr, J. R., Ferguson, S. H., Watt, C. A., Mead, J. G., Potter, C. W., Dietz, R., Giuseppetti, A. A., Black, S. R., Trachtenberg, A. J. and Kuo, W. P. (2014), Sensory ability in the narwhal tooth organ system. Anat. Rec., 297: 599–617. doi:10.1002/ar.22886

Comments are moderated: (1) Stay on topic (2) Be respectful (3) Refrain from vulgarity and abusive language (4) Do not publish materials that violate copyright. OFFENDING COMMENTS WILL BE DELETED.

Jeffrey Gallant is the Editor-in-Chief and Records Keeper of the Diving Almanac. He is also a contributing editor of DIVER Magazine, and the scientific director of the Greenland Shark and Elasmobranch Education and Research Group (GEERG). Jeffrey started diving in 1982.

This Is A Custom Widget

This Sliding Bar can be switched on or off in theme options, and can take any widget you throw at it or even fill it with your custom HTML Code. Its perfect for grabbing the attention of your viewers. Choose between 1, 2, 3 or 4 columns, set the background color, widget divider color, activate transparency, a top border or fully disable it on desktop and mobile.

This Is A Custom Widget

This Sliding Bar can be switched on or off in theme options, and can take any widget you throw at it or even fill it with your custom HTML Code. Its perfect for grabbing the attention of your viewers. Choose between 1, 2, 3 or 4 columns, set the background color, widget divider color, activate transparency, a top border or fully disable it on desktop and mobile.