Don't know what to say except I am glad you are still here. And just to show off, here's a picture of a heart. Wanted to be really clever and subtitute the parts for Mudcatter's names. But I didn't know who.

 
            |  \ \ | |/ /
            |  |\ `' ' /
            |  ;'aorta \      / , pulmonary
            | ;    _,   |    / / ,  arteries
   superior | |   (  `-.;_,-' '-' , vena cava
            | `,   `-._       _,-'_
            |,-`.    `.)    ,<_,-'_, pulmonary
           ,'    `.   /   ,'  `;-' _,  veins
          ;        `./   /`,    \-'
          | right   /   |  ;\   |\
          | atrium ;_,._|_,  `, ' \
          |        \    \ `       `,
          `      __ `    \   left  ;,
           \   ,'  `      \,  ventricle
            \_(            ;,      ;;
            |  \           `;,     ;;
   inferior |  |`.          `;;,   ;' vena cava 
            |  |  `-.        ;;;;,;'
            |  |    |`-.._  ,;;;;;'
            |  |    |   | ``';;;'  
                    aorta 

You can print it out and colour it.