Front

What is the main organ of the circulatory system?

Back

heart

Front

The circulatory system works with the ___________ system to provide our body with oxygen.

Back

respiratory

Front

What is the main function of the circulatory system?

Back

Transport blood, nutrients, and gases throughout the body.

Front

Which system responds by delivering more oxygen to cells when running causes the muscular system to use oxygen faster?

Back

circulatory

Front

What do you call the air sacs that are covered with capillaries where gas exchange takes place?

Back

alveoli

Front

The large muscle that contracts and relaxes and moves air in and out of the lungs.

Back

diaphragm

Front

What is the purpose of the respiratory system?

Back

takes in oxygen and release carbon dioxide

Front

What causes air to be exhaled from the lungs?

Back

The diaphragm relaxes and moves upward.

Front

The respiratory system is the body system in which _______ exchange takes place.

Back

gas

Front

How do your circulatory and respiratory systems work together?

Back

Oxygen and carbon dioxide are exchanged between your lungs and blood.