What is the most muscular chamber in the heart?

Answer 1

The left ventricle. The right ventricle is responsible for providing circulation to the pulmonary circuit which is smaller that the systemic circuit. The left ventricle is the last chamber that the blood enters before leaving the heart. Because of this it is the most muscular due to the force needed to overcome all the resistance to flow from systemic circulation. Hope this helps!

Answer 2

The right ventricle - this is the chamber of the heart that pumps blood into the aorta which then disperses into the rest of the body. This act requires a large amount of force, explaining why this chamber is also the most muscular.