Hey Justine, This is an awesome comment, and I'm glad you brought this up. It is common for textbooks to use blue coloring to represent deoxygenated blood, and red coloring to represent oxygenated blood, and it's a great way to depict this information, but it's also completely arbitrary. I have seen diagrams where oxygen rich blood is red, and other diagrams where oxygen rich blood is blue. We just as easily could of used yellow and green. My biggest objection to the oxygenated/red deoxygenated/blue scheme you described is I think it perpetuates the common misbelief that deoxygenated blood is blue, as I was told when I was a kid. In all actuality, oxygen rich blood is a brighter red color, and oxygen poor blood is a darker red.
I'm going through my EMT class now and preparing for my final exam. This video explained the 21 steps in a way that was much easier for me to understand, and the mnemonics actually help a lot. Thanks!
If you're using red/blue to indicate if the blood is oxygenated or deoxygenated, I think the colors are switched up. With the function of the pulmonary system (capillary/alveolar gas exchange), blood becomes oxygenated in the lungs. So blood coming from the lungs to the heart and from the heart to our system should be oxygenated (red), while blood coming from our system back to the heart should be deoxygenated (blue). If that makes sense. On the other hand, the steps of the cycle are perfectly explained.
Hey Justine,
This is an awesome comment, and I'm glad you brought this up. It is common for textbooks to use blue coloring to represent deoxygenated blood, and red coloring to represent oxygenated blood, and it's a great way to depict this information, but it's also completely arbitrary. I have seen diagrams where oxygen rich blood is red, and other diagrams where oxygen rich blood is blue. We just as easily could of used yellow and green.
My biggest objection to the oxygenated/red deoxygenated/blue scheme you described is I think it perpetuates the common misbelief that deoxygenated blood is blue, as I was told when I was a kid. In all actuality, oxygen rich blood is a brighter red color, and oxygen poor blood is a darker red.
I'm going through my EMT class now and preparing for my final exam. This video explained the 21 steps in a way that was much easier for me to understand, and the mnemonics actually help a lot. Thanks!
Great video. Just what I was looking for helping with my refresher. 👍🏾
If you're using red/blue to indicate if the blood is oxygenated or deoxygenated, I think the colors are switched up. With the function of the pulmonary system (capillary/alveolar gas exchange), blood becomes oxygenated in the lungs. So blood coming from the lungs to the heart and from the heart to our system should be oxygenated (red), while blood coming from our system back to the heart should be deoxygenated (blue). If that makes sense. On the other hand, the steps of the cycle are perfectly explained.
I don't understand where the coronary arteries come into play, my sheet doesn't include it.
thankyou!
you should have switched color marker. red should be oxygen blood, blue should be de-oxygen blood
cool video
Thanks!