Human bodies aren’t built for extreme aging: our capacity is set at about 90 years. But what does aging really mean, and how does it counteract the body’s efforts to stay alive? Monica Menesini details the nine physiological traits that play a central role in aging.
Lesson by Monica Menesini, animation by Cinematic.
View full lesson: http://ed.ted.com/lessons/why-do-our-…
In the first video in our two part series on HIV and AIDS, we explain how scientists figured out what HIV is, when the infection morphs into AIDS, and where they think the virus originated. Continue reading
41800307 – main blood cells in scale isolated on white background
Cells require a constant supply of glucose and oxygen to produce energy. Cellular respiration occurs in the mitochondria of a cell. 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.
Students observe the effect of cell volume and surface area on the extent of diffusion of the sodium hydroxide solution through the “cell”.
Imagine something small enough to float on a particle of dust that holds the keys to understanding cancer, virology, and genetics. Continue reading
Harvard University selected XVIVO to develop an animation that would take their cellular biology students on a journey through the microscopic world of a cell, illustrating mechanisms that allow a white blood cell to sense its surroundings and respond to an external stimulus. This award winning piece was the first topic in a series of animations XVIVO is creating for Harvard’s educational website BioVisions at Harvard.
The Thing, Human Torch, Invisible Woman and Mister Fantastic are back this summer! In the new reboot, the team gets its powers while in an alternate dimension. Here at Reactions, though, we stick to comic book canon. In this week’s video, we explain the original way the Fantastic Four got their power – radiation – with help from SciPop Talks.