about blood

What is the primary function of red blood cells in blood transportation?

• Fighting infections and diseases.
• Transporting nutrients and hormones.
• carrying oxygen

• Regulating body temperature.

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

• Pulmonary artery
• Vein
• Capillary
• Aorta

What type of blood vessel carries blood back to the heart?

• Arteries
• Aorta
• Veins
• Capillaries

What component in the blood is responsible for clotting?

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

Which blood vessel type has walls that are one cell thick, allowing for the exchange of gases and nutrients?

• Arteries
• Capillaries
• Venules
• Veins

What organ pumps blood throughout the body?

• Heart
• Liver
• Kidneys
• Lungs

The pulmonary veins carry blood from the lungs to which part of the heart?

• right atrium
• aorta
• left atrium
• left ventricle

What type of blood cells help fight infections and foreign invaders?

• Red blood cells
• Platelets
• Plasma cells
• White blood cells (leukocytes)

What is the liquid portion of blood called?

• plasma
• white blood cells
• serum
• red blood cells

Which part of the circulatory system has valves to prevent backflow of blood?

• Veins
• Capillaries
• Arteries
• Heart