Cardiovascular System 2, Heart, Blood flow through the heart

The function of the mitral valve is to prevent reflux of blood from the;
a. right ventricle into the right atrium
b. right atrium into the right ventricle 
c. left ventricle into the left atrium  
d. left atrium into the left ventricle 

The function of the tricuspid valve is to prevent reflux of blood from the;
a. right ventricle into the right atrium 
b. right atrium into the right ventricle 
c. left ventricle into the left atrium 
d. left atrium into the left ventricle 

Which chamber of the heart receives blood from the inferior and superior vena cava?
the left atrium
the right atrium  
the left ventricle
the right ventricle

The ‘Dub’ noise is caused by the;
a. opening of the atrioventricular valves
b. closure of the atrioventricular valves
c. opening of the arterial valves
d. closure of the arterial valves

[whales]

Some human beings are just so blessed with explaining things! I couldn't imagine how to understand "a little bit " of this without this Doctor. He's so good at it.👏👏👏

[dr.richmondakwasiowusu]

Awww my God!
Throughout my 6 yrs in medical school
I have not met a lecturer who explains and simplifies things to be well understood like this Dr.God bless you sir

[antonykimotho]

I’m always fascinated with the cardiac and neuro systems and of all the years I’ve spent in school, no one have ever explained the cardiac system in a such cool, calm collected and detailed way. Thank you doctor. I wish you were one of my teachers back then. I appreciate your work. Thanks for sharing. You have done a phenomenal job!!!

[leticiagomez]

Dr Campbell you are so awesome. I learned more from your youtube classes then I have in nursing school. thank you !!

[heatherrose]

Lub-dub. Lub-dub. Lub-dub. I never knew the sound the heart makes is actually the valves slamming shut. That is FASCINATING!! I am LOVING these videos!

[hasiniprasuna]

Sir, You made my learning easier with your classes. I always explain my mother about what you have taught me. She appreciates me a lot. And of course, I'd like to explain my mother every thing what you have said. I have no interest in any other things or subjects except knowing about the heart. You made me and my mom grew more interest on this subject. I am 11 and can easily understand your classes. Thank you sir.

[dancingdreamu]

Thank you Dr. Campbell. I'm not sure you realize just how many people appreciate you taking the time to teach. We are blessed to have you.

[ulsmith]

Best explanation of the circulatory system I have ever see.

[MsCeeelia]

"Try it on one of your friends, as soon as possible"! Absolutely brilliant. These videos have been so incredibly helpful, layering the complexity so that it is still completely clear all the time. I thank you.

[shahbaz]

God bless you Dr. You are making medical students life easy.

[sheriff]

I was stressing about this section for so long, but I saw this video and it made everything so easy, I just want to say thank you and you are one of the best teachers i have ever seen

[jonathansalazar]

This dude is a genius he explains things barney style which is exactly what I need good job DOC!

[ilianah]

I've learned so much more in the past 10 mins than I have with my sub for the past 3 weeks

[neilxdgaming]

Can’t thank you enough Dr.Cambell.... I never took science classes and now at age of almost 40, I am going back to school for a better future... learning anatomy I thought will be hard and it is hard; however, your videos are helping me so much... Thank you very much...

[fledanow]

These lectures are wonderful. So clear and the physical demonstrations, such as the hand movements showing the valve action, make things easier to understand. This is the best series I have seen for explaining the workings of our bodies.

[mamoetichoks]

I am a high school teacher. I watched this video over and over before showing it to my learners. Thank you Doc. you made my job easier and just ignited my passion for teaching Biology

[iinnqtj]

As a critical care nurse, i am so happy to see more of your lectures

[tituskisilu]

Can't emphasize more than to say I have learned a 3 hr lesson within 20 min and understood even better

[nikkishahi]

Sir, you are simply fantastic...this is what I would wish all educators would be like.
Thankyou for exchanging your knowledge in such simple form.

[craigzale]

Dr Campbell you are always fun to listen and watch. I just forwarded this to my department and told them "we can learn about the same thing over and over and say or think nothing is new but there are always different take aways from each experience that helps to form a strong correlation between theory and practical application". Fantastic stuff, thank you for taking the time to share these things.