Pericardium (anatomy)

Back to the mediastinum and the heart, we take a look at an imaginary pericardium. What are its layers, where is it, and why is it there?
Daily Anatomy App:

For a random human anatomy question every day on your phone you can get my Daily Anatomy question app from the Apple App Store:

https://itunes.apple.com/gb/app/daily-anatomy/id1001729137

or Google Play Store:

https://play.google.com/store/apps/details?id=com.suanatomy.dailyanatomy

Music by Jahzzar
Album: HiFi City Tales
Song: Bodies
https://soundcloud.com/jahzzar

Видео Pericardium (anatomy) канала Sam Webster