What is the function of the fibrous pericardium?

What is the function of the fibrous pericardium?

• A. It secretes serous fluid to minimize friction.
• B. It stores adipose tissue for energy.
• C. It anchors the heart and prevents overfilling.
• D. It conducts electrical impulses through the heart.

Answer: (C)

The fibrous pericardium mainly provides mechanical stability for the heart. It’s a tough outer sac of dense connective tissue that anchors the heart in the middle of the chest, attaching to the diaphragm, sternum, and great vessels. This inelastic envelope keeps the heart in place and helps prevent overexpansion as venous return increases, protecting the heart from injury and maintaining stable pressures. Secreting serous fluid to minimize friction is the job of the serous pericardium, not the fibrous layer. Storing adipose tissue for energy and conducting electrical impulses are not functions of the fibrous pericardium; those relate to adipose tissue distribution and the heart’s conduction system, respectively.

The fibrous pericardium mainly provides mechanical stability for the heart. It’s a tough outer sac of dense connective tissue that anchors the heart in the middle of the chest, attaching to the diaphragm, sternum, and great vessels. This inelastic envelope keeps the heart in place and helps prevent overexpansion as venous return increases, protecting the heart from injury and maintaining stable pressures.

Secreting serous fluid to minimize friction is the job of the serous pericardium, not the fibrous layer. Storing adipose tissue for energy and conducting electrical impulses are not functions of the fibrous pericardium; those relate to adipose tissue distribution and the heart’s conduction system, respectively.