How does our heart rate get affected by sitting up or lying down?

Subject: How does our heart rate get affected by sitting up or lying down?

Date: Sun Mar 6 19:42:17 2005
Posted by alex
Grade level: 10-12 School: MHS
City: Milpitas State/Province: CA Country: 95132
Area of science: Anatomy
ID: 1110159737.An

Message:


I don't get how our heart rate is low when we're lying down but when we are 
sitting up, our heart rate is up.  I also don't get why our heart rate is up 
when we're inhaling and down when exhaling.  Please help.  Thank you. =)

Re: How does our heart rate get affected by sitting up or lying down?

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