Circulatory System Quiz

What is the function of the heart?

• To filter blood

• To pump blood around the body

• To store oxygen

• To produce hormones

Which layer of the heart is the muscular middle layer?

• Endocardium

• Myocardium

• Pericardium

• Epicardium

What is the brief period of rest and relaxing of the cardiac muscle called?

• Systole

• Diastole

• Ventricular contraction

• Atrial contraction

Which type of blood vessel carries blood away from the heart?

• Veins

• Capillaries

• Arteries

• Lymphatics

Which chamber of the heart does blood enter after passing through the tricuspid valve?

• Left atrium

• Right atrium

• Right ventricle

• Left ventricle

What is the largest artery in the body?

• Pulmonary artery

• Aorta

• Superior vena cava

• Inferior vena cava

What are erythrocytes commonly known as?

• White blood cells

• Platelets

• Red blood cells

• Plasma cells

What are leukocytes also known as?

• Red blood cells

• Platelets

• White blood cells

• Plasma cells

What is the primary function of thrombocytes?

• Fighting infection

• Blood clotting

• Removing toxins

• Developing antibodies

What do lymphocytes develop to fight infection?

• Toxins

• Bacteria

• Antibodies

• Platelets