Grade 9 Science Quiz

Which chamber of the heart pumps oxygenated blood to the body?

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle

Which blood vessels carry blood away from the heart?

• Veins

• Arteries

• Capillaries

• Venules

Which part of the blood helps in clotting?

• Red blood cells

• White blood cells

• Plasma

• Platelets

The main function of the respiratory system is to ___.

• Transport nutrients

• Exchange gases between the body and environment

• Pump blood throughout the body

• Produce hormones

The tiny air sacs in the lungs where gas exchange occurs are called ___.

• Bronchi

• Trachea

• Alveoli

• Diaphragm

Which blood component transports oxygen throughout the body?

• Platelets

• White blood cells

• Red blood cells

• Plasma

Which part of the respiratory system is also called the "voice box"?

• Pharynx

• Larynx

• Bronchi

• Trachea

Which blood vessels allow the exchange of nutrients, gases, and wastes between blood and tissues?

• Arteries

• Veins

• Capillaries

• Venules

Which disease occurs when the arteries are blocked by fatty deposits?

• Tuberculosis

• Asthma

• Atherosclerosis

• Bronchitis

Which disease of the respiratory system is caused by bacteria that mainly affects the lungs?

• Asthma

• Tuberculosis

• Emphysema

• Pneumonia