The force of blood pushing against the walls of the blood vessels is:

Which of these is transported by your blood?

Your______ blood cells carry oxygen to the muscles and ______blood cells fight against infection.

The blood returning from the body, enters the heart chamber called:

The heart pushes the blood to the lungs from this chamber:

Blood travelling from the heart to the lungs, then back to the heart is called the:

Your blood is made:

These are the smallest blood vessels where body tissues exchange carbon dioxide for oxygen:

Your muscular energy system that continually uses oxygen so you can be active for long periods of time, such as a long bike ride or running a 5k.

Improvement of the Respiratory system can:

This allows the blood in the heart to flow in only one direction:

The Cardio- Respiratory System is a combination of the Cardiovascular System and the Respiratory System.

A flap of tissue in the back of your mouth that keeps food from entering the lungs:

If you have good Cardio-respiratory endurance, your heart becomes stronger and more efficient so your resting heart rate will be faster.

Which of these activities would NOT be a good choice if we are trying to improve cardio respiratory endurance?

A large dome shaped muscle that separates your chest from your abdomen and helps with respiration.