- Next week, do blood vessels below the heart. - To help with the lab, there are a number of photos and diagrams on the bench. Start your dissection with the heart. Make a medial incision on the ...

The respiratory system is responsible for the exchange of carbon dioxide and oxygen in the human body. This system also helps remove metabolic waste products and keep pH levels in check. The major ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Take a deep breath in …and out. Feels good, right? And it's also necessary for staying alive. But what ...