Which organ pumps blood throughout the body?

What carries oxygen-rich blood from the lungs to the heart?

Which blood cells help in clotting?

Which blood cells fight infections?

Which is the largest artery in the human body?

What is the red pigment in red blood cells that carries oxygen?

Which type of blood vessel carries blood toward the heart?

Which part of the heart receives oxygen-poor blood from the body?

Which part of the heart pumps oxygen-rich blood to the body?

Which fluid component of blood carries nutrients, hormones, and waste?