What are the main components of the cardiovascular system?

• Lungs and diaphragm

• Heart and blood vessels

• Arteries and veins

• Blood and lymph

Which circuit carries blood to the lungs for gas exchange?

• Systemic circuit

• Pulmonary circuit

• Coronary circuit

• Fetal circuit

What type of blood does the right side of the heart receive?

• Oxygenated blood

• Deoxygenated blood

• Nutrient-rich blood

• Oxygen-poor blood

Which chamber of the heart is responsible for pumping oxygenated blood to the body?

• Right atrium

• Left ventricle

• Right ventricle

• Left atrium

During systole, which valves are closed?

• Semilunar valves

• Atrioventricular valves

• Both types of valves

• None of the above

The pericardial fluid serves what purpose?

• Transports oxygen

• Lubricates the heart

• Pumps blood

• Filters blood

Which layer of the heart is primarily composed of muscle tissue?

• Endocardium

• Epicardium

• Myocardium

• Pericardium

The right ventricle outflows blood through which valve?

• Aortic valve

• Tricuspid valve

• Pulmonary valve

• Mitral valve

What is the purpose of the chordae tendineae?

• Connect muscles to bones

• Support the heart structure

• Prevent valve inversion

• Facilitate blood flow

The left atrium primarily receives blood from which structure?

• Inferior vena cava

• Pulmonary veins

• Aorta

• Coronary sinus