Brain Test Quiz

Which living organism can make its own food?

Which organ controls breathing and heartbeat?

What is the hardest substance in the human body?

Which blood component helps in clotting?

Which animal lays eggs and gives milk?

Which condition is characterized by progressive memory loss?

What is the medical term for excessive bleeding?

What is the term for the body's natural defense against illness?

What type of blood vessel carries oxygen-rich blood from the heart?

What is the most crowdest city in the world?