Exploring Numbers and Circulation

Convert the Roman numeral IX to Arabic numerals.

• 8

• 10

• 9

• 7

What is the name of the upper chamber of the heart?

• pulmonary artery

• ventricles

• aorta

• atria

Calculate the sum of 245, 367, and 128.

• 512

• 600

• 740

• 850

What is the function of the aorta in the circulatory system?

• The aorta regulates blood pressure in the lungs.

• The aorta carries oxygenated blood from the heart to the body.

• The aorta is responsible for filtering blood in the kidneys.

• The aorta carries deoxygenated blood to the heart.

Identify the part of the heart that pumps blood to the lungs.

• Left atrium

• Left ventricle

• Right atrium

• Right ventricle

Convert the Roman numeral XLV to Arabic numerals.

• 30

• 40

• 45

• 50

What are the two main types of blood vessels?

• Capillaries and arteries

• Arteries and veins

• Arteries and capillaries

• Veins and lymphatics

Calculate the sum of 512, 289, and 134.

• 935

• 1024

• 800

• 750

What is the role of red blood cells in the body?

• Red blood cells help in the formation of bones.

• Red blood cells transport oxygen and carbon dioxide in the body.

• Red blood cells produce hormones in the body.

• Red blood cells are responsible for digestion.

Name the valve that prevents backflow of blood into the heart.

• Atrioventricular valve (tricuspid and mitral valves) and semilunar valves (pulmonary and aortic valves)

• Bicuspid valve

• Aortic arch

• Pulmonary artery