Yes I know it isn't camping but how else would I get your attention! 
Draw the hear as two double boxes
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One each side A before V, Atrium before ventricle
ON the left side as you look at at RA and RV
VC in PA out
Vicious Cocks (in), Push Away
On the right side as you look at it LA and LA
Pushy Vaginas (in) Always (away)!
make it rude, and you remember it......PS I'm not this rude with the kids 