A two-layered sac surrounding the heart is called

Pericardium

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Perichondrium

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Periosteum

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Pleura

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Solution

The correct option is A
Pericardium

The heart remains enclosed in a double-walled sac called pericardium, consisting of an outer non-distensible fibrous layer and an inner serous layer. In between the two layers, there is a very narrow space, called the pericardial cavity, which is filled with pericardial fluid.

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A two-layered sac surrounding the heart is called:

A human heart is enclosed in a double-walled sac called pericardium.

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