2.4 Science: Blood Circulatory System, Set 1

What is the primary function of red blood cells?

• Fight infections
• Carry oxygen
• Form blood clots
• Produce hormones

What component of blood helps in clotting?

• Plasma
• Red blood cells
• White blood cells
• Platelets

Where is oxygen exchanged in the circulatory system?

• Heart
• Lungs
• Liver
• Kidneys

Which blood vessel carries oxygenated blood from the lungs to the heart?

• Pulmonary artery
• Pulmonary vein
• Aorta
• Vena cava

What is the largest artery in the human body?

• Pulmonary artery
• Aorta
• Vena cava
• Carotid artery

Which valve is located between the left atrium and left ventricle?

• Tricuspid valve
• Mitral valve
• Pulmonary valve
• Aortic valve

What term describes the liquid component of blood?

• Plasma
• Hemoglobin
• Leukocytes
• Thrombocytes

What is the function of hemoglobin in red blood cells?

• Clotting blood
• Fighting infections
• Transporting oxygen
• Producing antibodies

Which type of blood vessel is the smallest and allows for the exchange of substances between blood and tissues?

• Arteries
• Veins
• Capillaries
• Arterioles

What is the normal resting heart rate for adults?

• 50-60 beats per minute
• 60-70 beats per minute
• 70-80 beats per minute
• 80-90 beats per minute