Circulatory System and Respiratory

Running is an activity that causes the cells in the muscular system to use oxygen at a faster rate. Which system responds by delivering more oxygen to these cells?

• digestive

• nervous

• circulatory

• endocrine

It consists of...

• the heart, which is a muscular pumping device.

• the heart, which is a muscular pumping device, and a closed system of vessels called arteries and capillaries.

• the heart, which is a muscular pumping device, and a closed system of vessels called arteries, veins, and capillaries.

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

• epiglottis

• alveoli

• diaphragm

• trachea

What is the main function of the respiratory system?

• to provide oxygen and remove carbon dioxide from the body

• to bring oxygen to the body

• to break down food and absorb nutrients

• to remove oxygen from the body and deliver carbon dioxide

Which body system is shown here?

• circulatory system

• respiratory system

What is the main function of blood?

• supports and protects your body

• it removes liquid waste from the body

• it sends signals to your brain

• it carries oxygen to all your body cells and returns carbon dioxide to the lungs

How do the Circulatory and Respiratory Systems work together?

• you inhale oxygen, your blood delivers that oxygen to your cells and brings CO2 back to lungs to exhale

• your circulatory and respiratory systems don't work together

• the circulatory system helps your respiratory system digest food

Which body system is shown here?

• circulatory system

• respiratory system

What is the main organ in the circulatory system?

• lungs

• heart

• diaphragm

• bronchi

You breathe in ___________ and breathe out ___________

• carbon dioxide, oxygen

• oxygen, carbon dioxide