Heart 2, Blood flow is controlled by valves

[@dejanvukovic9763]

That is the very best explanation and thank you so much indeed.

[@shashimoghe3920]

Dr Campbell fantastic presentation by you deserve plenty of compliments thanks and good wishes 15/12/2019

[@yaxiu3799]

You will never find a better explanation of heart than Dr. John's. Thank you doctor!

[@WayOfLife-vr5gn]

Excellent sir, very interesting and giving correct meaning of what i studied in school lessons and now i understood after your lesson.. Very good explanation and details...

[@ridossoromano9101]

Our engine!

[@qasimkhan-qv9hi]

Thanks looking forward to teach us more, best regards.

[@ahmedalkamel121]

1.C
2.A
3. Right atrium
4.D

[@Campbellteaching]

All correct, well done

[@ayaayman5985]

It's very good thank you☺️

[@merymery4190]

👍

[@lily_sunshine6991]

To answer your questions:
1. D
2. B
3. Right Atrium
4. D

[@victoriatucker6271]

I’m looking for the video you did that you talked about how much blood is pumped through the heart per contraction?

[@faiyazmohiul4771]

Really appreciating thank you sir.

[@wendycross4713]

My Cardio Dr has told me one of my valves was on the outside so what does this mean?

[@pameladearing4870]

Amazing description

[@mark-williamsgregory6442]

Thanks so much , you're the best

[@dr.hectorflorian4197]

Thank you Dr.

[@tondeize]

You tha man Doc

[@drnirmal4068]

1 c
2 a
3 b
4 b