The Double-Walled Membranous Sac That Protects Against Friction and Permits

question 67

Multiple Choice

The double-walled membranous sac that protects against friction and permits the heart to move freely during contraction is called the

• A) epicardium
• B) pericardium
• C) endocardium
• D) myocardium

---

Definitions:

Disinfectants

Chemical agents used to destroy or inhibit the growth of harmful organisms, especially in cleaning products.

Hydrogen

The lightest and most abundant element in the universe, consisting of one proton and one electron, widely used in chemical processes and as a potential clean fuel source.

Water

A colorless, tasteless, and odorless substance in its pure form, essential for all known forms of life.

Demand Constraint

A demand constraint is a limitation that affects the quantity of a product that can be sold or demanded in the market, potentially due to factors like production capacity or regulatory issues.