Magic School Bus “Works Out”

Front

What system are your lungs in?

Back

Respiratory system

Front

What do lungs breathe in?

Back

Oxygen

Front

What do blood cells carry from the lungs?

Back

Oxygen

Front

What does the heart pump to our muscles?

Back

Blood

Front

What do muscles produce when they work without oxygen?

Back

Lactic acid

Front

What system are your muscles in?

Back

Muscular system

Front

What happens to Mrs. Frizzle’s muscles without enough oxygen?

Back

They stop working.

Front

What is the main function of the respiratory system?

Back

To take in oxygen and remove carbon dioxide.

Front

What is the role of blood in the body?

Back

To transport oxygen and nutrients to cells.

Front

What happens to muscles when they have enough oxygen?

Back

They can continue working effectively.