The role of the fluid in the pericardial cavity is mainly to reduce friction on the heart as it beats. The serous pericardium has layers of its own-the visceral and parietal layers-with a fluid-filled space between them called the pericardial cavity. The outer layer consists of fibrous tissue (fibrous pericardium) and an inner serous membrane (serous pericardium). Okay, so here we have a beautiful human heart and the roots of the great vessels enclosed in a protective fibroserous sac known as the pericardium. That was important information that I could have used in the 4th grade to gain extra points on our "LABEL THE HUMAN BODY" quiz (but I used it down the road as a mnemonic device in my 9th grade lab). I don't know about you, but when I first learned about the heart I was downright shocked that no one had told me that the heart basically lives inside a pillowcase. Because that's just the kind of heartbreaker I am.ĭon't have time to read? Then watch this:įind more A&P videos on our YouTube channel.Ī Silent Guardian, A Watchful Protector: The Pericardium If you're like me and still feel cheated out of the satisfaction of a heart dissection well done, then you're in luck! I'm going to peel back the heart layer by layer with Human Anatomy Atlas. I asked my teacher where they were from so that I'd never go there ever, but she just smiled enigmatically and began the lesson. Sheep's brain, yes-as well as a slew of other creatures, including the biggest grasshopper I've ever seen.
I never had the good fortune of dissecting a heart in school. While it's responsible for keeping your body in perfectly oxygenated condition, it's also commonly used as a metaphor and a gauge of one's mettle, and is the subject of about a bajillion soft rock ballads from the 80s and 90s. That Boom Boom Pow: Virtual Dissection (sort of) of the Human Heart
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