Pericardium Flashcards
What is the function of the pericardial sac (pericardium)?
Protects the heart, prevents overfilling, and produces a lubricating fluid.
What are the three layers of the pericardium?
Fibrous parietal pericardium, parietal layer of serous pericardium, and visceral layer of serous pericardium.
Tough external layer of connective tissue that surrounds the serous pericardium and prevents overfilling; it is attached to the central tendon of the diaphragm and blends with the tunica external of the great vessels of the heart.
Fibrous parietal pericardium
Thin two-layered serous membrane composed of an outer parietal layer and internal visceral layer; produce pericardial fluid to line the pericardial cavity.
Serous pericardium
Covers the deep surface of the fibrous parietal pericardium.
Parietal layer of serous pericardium.
Serous tissue that intimately follows the external contours of the heart surface.
Visceral layer of the serous pericardium.
What is the epicardium?
The combination of the visceral layer of the serous pericardium with the underlying loose connective tissue and the adipose tissue.
The space between the parietal and visceral layers of serous pericardium; contains serous fluid, which lubricates the heart to reduce friction.
Pericardial cavity
How many pericardial sinuses does the pericardial sac have?
2
A horizontal space between the arterial ends of the heart vessels anteriorly and venous ends posteriorly.
Transverse sinus
A cul-de-sac space deep to the heart and surrounded by the reflection of the serous pericardium around the IVC and the right and left pulmonary veins.
Oblique sinus
Parietal pericardium receives general sensory innervation from the ______ _____
phrenic nerve
Visceral pericardium receives visceral sensory innervation from ______ ____ and ______ _____
sympathetic nerves, vagus nerve.
Where does the blood supply of the heart come from?
Pericardiacophrenic vessels.
