Now that we've talked about your blood vessels, we're going to zoom in a little closer and talk about your blood itself. We'll start by outlining the basic components of blood -- including erythrocytes, leukocytes, platelets, and plasma -- as well as the basic process of hemostasis that stops bleeding, and how antigens are responsible for the blood type that you have. By the end of this episode, you should be totally prepared for your next blood drive.
Table of Contents
The Basic Components of Blood 2:30
Erythrocytes, Leukocytes, Platelets, and Plasma 3:00
The Basic Process of Hemostasis 4:45
How Antigens Are Responsible For Your Blood Type 6:21
Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse
Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:
Mark, Jan Schmid, Simun Niclasen, Robert Kunz, Daniel Baulig, Jason A Saslow, Eric Kitchen, Christian, Beatrice Jin, Anna-Ester Volozh, Eric Knight, Elliot Beter, Jeffrey Thompson, Ian Dundore, Stephen Lawless, Today I Found Out, James Craver, Jessica Wode, Sandra Aft, Jacob Ash, SR Foxley, Christy Huddleston, Steve Marshall, Chris Peters
Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support Crash Course on Patreon: http://patreon.com/crashcourse
CC Kids: http://www.youtube.com/crashcoursekids
Nitrogen makes up 78% of the air, however neither plants nor animals can take nitrogen directly from the air because nitrogen is so unreactive.
The nitrogen cycles shows the movement of nitrogen through the environment. Nitrogen is continually cycled through the air, soil and living things.
Plants take up nitrogen compounds as nitrates from the soil. Animals then eat these plants, thus getting their nitrogen.
The process of nitrogen in the atmosphere being turned into nitrogen in the soils is called fixing. There are different ways that nitrogen is 'fixed; including nitrogen fixing bacteria in the soil which turns nitrogen from the air into nitrates. Decomposers in the soils break down animal excretion and dead organisms, returning nitrogen back to the soil as ammonia. Lightning can cause chemical reactions in the atmosphere, resulting in nitrogen reacting with oxygen to produce nitrous oxide. Burning fossil fuels also adds nitrous oxide to the atmosphere, resulting in nitric acid, but this is of course not a natural way of nitrogen fixing. Blue-green algae in the ocean also can fix nitrogen. This then provides sources of nitrogen to aquatic animals, and the nitrogen goes around a similar cycle to what happens on land.
The Haber Process makes up approximately 30% of nitrogen fixing.
Denitrifying bacteria in the soil break down nitrates and return nitrogen back to the air. This reduces the fertility of the soil.
SUBSCRIBE to the Fuse School YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT.
JOIN our platform at www.fuseschool.org
This video is part of 'Chemistry for All' - a Chemistry Education project by our Charity Fuse Foundation - the organisation behind FuseSchool. These videos can be used in a flipped classroom model or as a revision aid. Find our other Chemistry videos here:
Access a deeper Learning Experience in the Fuse School platform and app: www.fuseschool.org
Follow us: http://www.youtube.com/fuseschool
Friend us: http://www.facebook.com/fuseschool
This Open Educational Resource is free of charge, under a Creative Commons License: Attribution-NonCommercial CC BY-NC ( View License Deed: http://creativecommons.org/licenses/by-nc/4.0/ ). You are allowed to download the video for nonprofit, educational use. If you would like to modify the video, please contact us: email@example.com
You will learn about "Nitrogen Cycle" in this video. Nitrogen constitutes around 78% of the air. However, atmospheric nitrogen cannot be used directly by plants and animals. Nitrogen needs to be converted to nitrogenous compounds in order to be used by plants. This process of converting nitrogen into nitrogenous compounds is called nitrogen fixation.
It takes place by a certain kind of bacteria called rhizobium bacteria which live in the root nodules of leguminous plants. They convert atmospheric nitrogen to ammonia. Nitrifying bacteria then convert ammonia to nitrites and then nitrates. Some nitrogen fixation also occurs by lightning strikes.
The plants then take these nitrates from the soil. Plants use these nitrates for the synthesis of plant proteins and other compounds. Animals then eat these plants and get the proteins. Dead plants and animal excreta contain nitrogenous wastes. Overtime, these wastes decay and ammonia is released. Nitrifying bacteria once again convert the ammonia to nitrates. Some nitrates are again used by the plants and the cycle continues. Some nitrates are converted by denitrifying bacteria into atmospheric nitrogen. Thus, Nitrogen gas goes back to the atmosphere. As a result, the percentage of nitrogen in the air remains more or less constant. This cycle is known as Nitrogen Cycle
Educational Videos for people of all ages: http://www.SmartLearningforAll.com
Subscribe to our YouTube Channel: http://www.youtube.com/user/Smartlearningforall?sub_confirmation=1
Explore how ATP is made in 3 steps of aerobic cellular respiration with the Amoeba Sisters! This also compares this process to photosynthesis and introduces ATP structure. Check out our FREE video handouts on www.amoebasisters.com!
We always welcome comments, but we do have our comments on "approval" only. Criticism is fine, but this is an education channel. No bad language or discriminatory comments allowed. In other words, don't put anything here you wouldn't tell grandma.
We Want to Connect with You!
Follow us on Twitter:
Be our friend on Facebook:
Pin with us on Pinterest:
Contact us at our website:
In which Hank does some push ups for science and describes the "economy" of cellular respiration and the various processes whereby our bodies create energy in the form of ATP.
Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-Complete-Series-DVD-Set
Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse
Follow CrashCourse on Twitter: http://www.twitter.com/TheCrashCourse
Special thanks go to Stafford Fitness (www.staffordfitness.net) for allowing us to shoot the gym scenes in their facilities.
This video uses sounds from Freesound.org, a list of which can be found, along with the CITATIONS for this episode, in the Google Document here: http://dft.ba/-25Ad
Table of Contents:
1) Cellular Respiration 01:00
2) Adenosine Triphosphate 01:29
3) Glycolysis 4:13
A) Pyruvate Molecules 5:00
B) Anaerobic Respiration/Fermentation 5:33
C) Aerobic Respiration 6:45
4) Krebs Cycle 7:06
A) Acetyl COA 7:38
B) Oxaloacetic Acid 8:21
C) Biolography: Hans Krebs 8:37
D) NAD/FAD 9:48
5) Electron Transport Chain 10:55
6) Check the Math 12:33
TAGS: crashcourse, biology, science, chemistry, energy, atp, adenosine triphosphate, cellular respiration, glucose, adp, hydrolysis, glycolysis, krebs cycle, electron transport chain, fermentation, lactic acid, enzyme, hans krebs, citric acid, ATP synthase Support CrashCourse on Subbable: http://subbable.com/crashcourse
This channel is excellent for Biology students looking for some online revision. Made by an experienced biology teacher from my school ! Really useful! Covers a range of topics with great detail. Leaving cert focused material !
Support Stated Clearly on Patreon: https://www.patreon.com/statedclearly
Special thanks to Rosemary at Bird and Moon Comics for supplying a handful of the critter illustrations: http://www.birdandmoon.com/
Special thanks to AD for the music! http://www.proofavenue.com/
Natural Selection is one of the main concepts found within the theory of evolution. It was discovered by Charles Darwin and Alfred Russel Wallace though Darwin championed the idea in his book "On the Origin of Species".
Natural selection can be defined as the process by which random evolutionary changes are selected for by nature in a consistent, orderly, non-random way.
When coupled with descent with modification, Natural Selection can cause a population to evolve for fitness within a given environment over multiple generations.
Natural Selection is an observable fact. By carefully observing populations of living things with short life cycles you can actually watch it happen.
Want to learn more? Check out our notes for this video. Included are links to three examples of natural selection witnessed by researchers. There are many more as well.
This project was funded by contributions from our viewers and from Brain-Tools LLC. Check out Brain Tools' new Alzheimer's treatment here: https://brain-tools.com/
See a Stated Clearly video we did for Brain Tools LLC here: http://youtu.be/rZ_n5X4MMGw