Heart

The heart is located in the _______ between the two pleural cavities that surround the lungs.

• abdominal cavity

• thoracic cavity

• pelvic cavity

• cranial cavity

The heart is a muscular pump consisting of _______ chambers.

• two

• three

• four

• five

The _______ receives blood through the 4 pulmonary veins, which drain blood from the lungs.

• left atrium

• left ventricle

• right atrium

• right ventricle

The _______ pumps blood into the pulmonary trunk.

• right atrium

• right ventricle

• left atrium

• left ventricle

The _______ pumps blood into the aorta.

• right atrium

• right ventricle

• left atrium

• left ventricle

The wall of the _______ contracts more forcefully and generates a greater blood pressure.

• right atrium

• right ventricle

• left atrium

• left ventricle

The atrioventricular valve between the right atrium and right ventricle is called _______.

• tricuspid valve

• pulmonary valve

• mitral valve

• aortic valve

The atrioventricular valve between the left atrium and rleft ventricle is called _______.

• tricuspid valve

• pulmonary valve

• mitral valve

• aortic valve

The _______ is composed of cardiac muscle cells and is respnsible for contraction of the heart chambers.

• endocardium

• epicardium

• myocardium

• pericardium

The smooth inner surface of the heart chamber is the _______.

• endocardium

• epicardium

• myocardium

• pericardium