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Lady bird [3.3K]
3 years ago
13

Double-layered sac. the innermost layer of this sac immediately surrounds the heart and is called the ____________________ peric

ardium (also called _______________). at the base of the heart, this inner layer folds back on itself to become the ________________ pericardium. between the layers of this sac is a potential space called the ______________ cavity and it is filled with _________ fluid. what is the function of this fluid?
Biology
1 answer:
dedylja [7]3 years ago
6 0
All i know is 'hat, it is composed of three layers
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