How Do Marine Mammals Hold Their Breath For So Long?

How is it possible for air-breathing marine mammals like sperm whales and elephant seals to hold their breath for so long?
You can help protect the thousands of species of flora and fauna that call Pacuare home. Visit EPI’s fundraising page at http://www.crowdrise.com/PreserveProtectPacuare.

Hosted by: Hank Green
———-
Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow
———-
Dooblydoo thanks go to the following Patreon supporters — we couldn’t make SciShow without them! Shout out to Justin Ove, Andreas Heydeck, Justin Lentz, Will and Sonja Marple, Benny, Chris Peters, Tim Curwick, Philippe von Bergen, Patrick, Fatima Iqbal, Lucy McGlasson, Mark Terrio-Cameron, Accalia Elementia, Kathy & Tim Philip, charles george, Kevin Bealer, Thomas J., and Patrick D. Ashmore.
———-
Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow
———-
Looking for SciShow elsewhere on the internet?
Facebook: http://www.facebook.com/scishow
Twitter: http://www.twitter.com/scishow
Tumblr: http://scishow.tumblr.com
Instagram: http://instagram.com/thescishow
———-
Sources:
https://books.google.com/books?id=ZpRRHTeksJcC&pg=PA75#v=onepage&q&f=false
https://www.unm.edu/~lkravitz/Article%20folder/Breathing.html
http://www.wiley.com/college/boyer/0470003790/structure/HbMb/mbhb_intro.htm
http://www.natureworldnews.com/articles/6453/20140327/cuviers-beaked-whale-sets-records-for-longest-and-deepest-dive.htm
https://www.sciencedaily.com/releases/2007/12/071218192033.htm
http://science.sciencemag.org/content/340/6138/1234192.full
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2596902/
http://news.rice.edu/2015/09/25/deep-diving-whales-could-hold-answer-for-synthetic-blood-2/
http://www.annualreviews.org/doi/full/10.1146/annurev.physiol.60.1.19
https://seagrant.uaf.edu/marine-ed/mm/fieldguide/adaptations.html
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0092633