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the saclike structure around the heart is the: a pericardium. b endocardium. c myocardium. d epicardium.

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Answer:

Pericardium

Step-by-step explanation:

Surrounding the heart is a saclike fibrous structure called the pericardium. Its function is mainly to protect the heart from overdistention (stretching too much when being filled with blood), and to maintain efficient function despite surrounding organs and structures.

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