Tissues, Organs, and Systems of Living Things Demo

2013-05-24_sci10_is-bigger-better-014-albertaCells 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….

 

What Happens When You Hold Your Pee?

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…

Dr. Frankenstein – A Lesson on Organ Systems

GradXraye 5: Life Systems

Contributed by: Derek Totten

I was working late in the lab one night when ….

Big Ideas:

  • Organ systems are components of a larger system (the body) and, as such, work together and affect one another.
  • Organ structures are linked to their functions.

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