Crash Course
Circulatory and Respiratory Systems
Viewers follow the paths of oxygen and carbon dioxide through the human respiratory organs and the path of the molecules through the human circulatory system, in a short video about how the body delivers oxygen and picks up carbon dioxide.
Stated Clearly
What is the Evidence for Evolution?
Would you believe whales and hippos share a common ancestor? The video discusses the evidence from a variety of scientific disciplines supporting evolution, focusing specifically on whales and their connections to hippos. The narrator...