I am the system responsible for circulating, or moving, blood to all other systems. What am I?

I am an instrument used to view microscopic organs. What am I?

I am the system responsible for carrying oxygen to your lungs so that you can respire, or breathe. What am I?

I am one of the body's building blocks, the smallest unit of life that can carry out functions of living things. What am i?

I am the tiny, one-celled organism that Anton van Leeuwenhoek discovered in water with his microscope. What am I?

I am made up of body tissues, groups of similar cells. What am I?

Many human organs are inside the body, but all of your sense organs are visible what are they? (click all that are correct)

what body system carries urine out of your body?

What is the name of the tube, next to the wind pipe, that carries food to your stomach?

I am a liquid that is vitally important to all like on Earth. What am I?

I am a nutrient that is vitally important in the first two years of life, but after that you should limit how much of me you eat. What am I?

Vitamins and minerals are two nutrients that are important to the human body but are needed in smaller amounts than proteins, fats, and carbohydrates.

I am the system that includes the brain and nerves. What am I?

I am the system that includes the heart and blood. What am I?

I am the system that includes the lungs. What am I?

I am the system that includes the mouth, large intestine, and the small intestine. What am I?