There are so many things your body can do without you thinking about it. How smart is your body? Watch More: Can We Travel Faster Than The Speed Of Light? ►►►► https://www.youtube.com/watch?v=xdl9UA07nx8 Support Life Noggin on Patreon: https://www.patreon.com/LifeNogginStudios?ty=h Follow Us! https://twitter.com/LifeNoggin https://facebook.com/LifeNoggin Click here to see more videos: https://www.youtube.com/user/lifenoggin Life Noggin is a weekly animated educational series. Whether it's science, pop culture, history or art, we explore it all and have a ton of fun doing it. Life Noggin Team: Animation by Steven Lawson Director/Voice: http://lifenogg.in/patgraziosi Executive Producer: http://lifenogg.in/IanDokie Director of Marketing: http://lifenogg.in/JaredOban Head Writer: http://lifenogg.in/KayleeYuhas Sources: http://wonderopolis.org/wonder/why-do-we-need-to-breathe https://www.blf.org.uk/support-for-you/how-your-lungs-work/why-do-we-breathe http://www.smithsonianmag.com/science-nature/why-do-we-blink-so-frequently-172334883/ http://www.healthguidance.org/entry/13956/1/Why-Do-We-Blink.html http://www.dailymail.co.uk/health/article-2005983/Why-biscuit-Doctors-reveal-science-hunger-pangs--them.html http://www.sciencedirect.com/science/article/pii/S0303720711001547 http://www.news-medical.net/health/What-Does-Ghrelin-Do.aspx http://www.bbc.co.uk/guides/zt22mp3 http://www.healthline.com/human-body-maps/hypothalamus http://www.brainfacts.org/brain-basics/neural-network-function/articles/2008/the-neural-regulation-of-thirst/ http://www.businessinsider.com/how-many-days-can-you-survive-without-water-2014-5 https://sleepfoundation.org/excessivesleepiness/content/why-do-we-need-sleep http://www.livescience.com/8075-older-adults-sleep.html http://www.cell.com/current-biology/fulltext/S0960-9822(14)00994-4 https://www.washingtonpost.com/posteverything/wp/2014/09/17/your-brain-actually-makes-decisions-while-you-sleep/?utm_term=.