 This video will cover the following objective describe the layers that form the pericardial sac and the layers of the heart wall The heart is found Protected within a pericardial sac also just known as the pericardium The pericardium has three layers. The outermost layer is the fibrous pericardium Which consists of density regular connective tissue that helps to anchor the heart in place and provide a strong protective outer coating surrounding the heart Deep to the fibrous pericardium is the parietal layer of the cirrus pericardium Which consists of a simple squamous epithelium anchored to the fibrous pericardium by some loose aerial or connective tissue Then there is a fluid filled space called the pericardial cavity separating the parietal layer of the pericardium from the visceral layer of the cirrus pericardium So the cirrus pericardium is a cirrus membrane and the visceral layer is also a simple squamous epithelium But this is also referred to as the epicardium Because there are three layers of the heart wall The most superficial of those the epicardium is the simple squamous epithelium on the surface Then the middle layer of the heart wall the myocardium contains cardiac muscle tissue and The innermost layer of the heart wall is known as the endocardium Which consists of a simple squamous epithelium lining the chambers of the heart