ASCII Art diagram of the human heart:
| \ \ | |/ /
| |\ `' ' /
| ;'aorta \ / , pulmonary arteries
| ; _, | / / ,
superior | | ( `-.;_,-' '-' ,
vena cava | `, `-._ _,-'_
|,-`. `.) ,<_,-'_, pulmonary veins
,' `. / ,' `;-' _,
; `./ /`, \-'
| right / | ;\ |\
| atrium ;_,._|_, `, ' \
| \ \ ` `,
` __ ` \ left ;,
\ ,' ` \, ventricle
\_( ;, ;;
| \ `;, ;;
inferior | |`. `;;, ;'
vena cava | | `-. ;;;;,;'
| | |`-.._ ,;;;;;'
| | | | ``';;;' FL
aorta
Disclaimer: I was not the artist for this excellent ASCII drawing. This was found in an ASCII art archive along with several other scientific drawings.