Question:
- located in the middle of chest cavity between the lungs (mediastinum space) - approximately the size of a human fist - pericardium: membrane enclosing heart, hold hear in place but also allows it to beat, prevents overstretching - made up of cardiac muscular tissue - heart is a double pump: left pumps from lungs to body, right pumps from body to lungs
Author: Abbey ManAnswer:
Heart structure
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Abbey Man![Abbey Man](https://lh4.googleusercontent.com/-KqJzJa-lwKk/AAAAAAAAAAI/AAAAAAAAAAA/AMZuucl0mFj_bOqMZvwiwPDbd8jjrQnoug/photo.jpg)