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Hep Cats by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1500022
Artist: http://incompetech.com/
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In this video:
An average healthy adult responds to nature’s call anywhere between 4 and 10 times each day. The need to take a leak begins when pressure in the bladder rises, stretching the bladder wall which is made up of bands of smooth muscle (detrusor) that are filled with beta adrenergic receptors that send and receive messages between the muscle’s cells and the nervous system.
Want the text version?: http://www.todayifoundout.com/index.php/2015/11/internal-mechanisms-peeing/
Sources:
http://www.ehs.net/2231/pdf/autonomic.pdf
http://highered.mheducation.com/sites/0072495855/student_view0/chapter27/animation__micturition_reflex.html
http://www.healthline.com/human-body-maps/bladder
http://www.healthline.com/human-body-maps/ureter
https://en.wikipedia.org/wiki/Cell_surface_receptor
http://www.healthhype.com/bladder-control-mechanism-for-urination-and-micturition-reflex.html
http://www.rnceus.com/uro/norm2.htm
http://www.niddk.nih.gov/health-information/health-topics/Anatomy/urinary-tract-how-it-works/Pages/anatomy.aspx
https://en.wikipedia.org/wiki/Urination
http://health.clevelandclinic.org/2013/10/what-the-color-of-your-urine-says-
