Oxygen forms about 21% of the air around us. In your body, oxygen forms a vital role in the production of energy in most cells. But if gases can only efficiently diffuse across tiny distances, how does oxygen reach the cells deep inside your body? Enda Butler tracks the surprisingly complex journey of oxygen through your body.
Lesson by Enda Butler, animation by Compote Collective.
View full lesson: http://ed.ted.com/lessons/oxygen-s-su…
Couresty of Patrick J Lynch
««« Written by Leila Knetsch.
This is an engaging activity that helps students see how the circulatory, respiratory and digestive systems interrelate. Continue reading
Body regeneration is not confined to Doctor Who or fictional worlds, it is actually present in animals that preserve their embryonic stem cells. Continue reading
Do all of your cells get switched out for new ones every seven years or so? Does anything remain with you throughout your entire life? Continue reading
Some say that beauty’s only skin-deep. But one veterinary surgeon and his team look beneath the surface…literally. Scott Echols says that we don’t actually know very much about the anatomy of animals because haven’t had a way to properly visualize it. But now, with the help of a new imaging technology called BriteVu, researchers have access to a trove of data on animal anatomy. Continue reading
Maddie Moate investigates why some animals have body parts that serve no purpose. Continue reading
Cells require a constant supply of glucose and oxygen to produce energy. As a result of this process, large quantities of waste carbon dioxide must be expelled from the cell. All materials involved in this reaction are either imported or exported through the cell membrane by diffusion.
In this demonstration, students soak agar “cells” containing phenolphthalein indicator in a solution of sodium hydroxide, NaOH(aq). Students observe the effect of cell volume and surface area on the extent of diffusion of the sodium hydroxide solution through the “cell”.
Click here to download the complete demo….
Can holding your pee be bad for you? Learn about your bladder in this Quick Question with Michael Aranda!
Hosted by: Michael Aranda
Learn more about sphincters: https://www.youtube.com/watch?v=gtLO9…
Learn more about Tycho Brahe: https://www.youtube.com/watch?v=H4tZ9…