Question

The heart is enclosed in a double-walled sac called?

Answer 1

The heart is enclosed in a double-walled sac called the pericardium or pericardial sac, consisting of the fibrous and parietal pericardium.

Step-by-step explanation:

The heart is enclosed in a double-walled sac called the pericardium or pericardial sac. It consists of two distinct sublayers: the fibrous pericardium and the parietal pericardium. The fibrous pericardium is made of tough, dense connective tissue that protects the heart, while the parietal pericardium is fused to the fibrous pericardium and surrounds the heart.

Answer 2

The pericardium is a double-walled sac containing the heart and the roots of the great vessels. The pericardial sac has two layers, a serous layer and a fibrous layer. It encloses the pericardial cavity which contains pericardial fluid.

Latin: Pericardium

Location: A sac around the heart

Artery: Pericardiacophrenic artery