Generation Genius Human Body Systems

What important substance is replenished as blood flows through the heart?

Your lungs are part of which body system?

Where does digestion start?

As your body works harder, what happens to your heart rate?

Which system pumps blood through your body?

What happens to what's left of our food after it goes through the intestines?

Which part of your digestive system absorbs nutrients into your bloodstream?

When Dr. Jeff bends his arms to lift the weight, what is happening to his bicep muscle?

As you exercise, your circulatory system works with which other system to take in oxygen?

If you take a rest after running a mile, what happens to your breathing rate?