Generation Genius Human Body Systems with pictures

Where does digestion start?

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

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

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

Which system pumps blood through your body?

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

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

Your lungs are part of which body system?

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

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