Human Body The Heart and Lungs

The smallest blood vessels are the _______.

What percent of your blood is red blood cells?

When your lungs are healthy, they are ________.

How many pumps does your heart have?

How many times does your heart beat in a week?

How long does it take for your blood to make a full trip throughout your body?

______ are the tiny hairs in your nose to keep out debris.

What kind of air goes through your trachea?

How many major arteries do you have in your body?

What do some people do when they get out in the sunlight?

How many breaths do you take each day?

These are all part of the human body EXCEPT _________.

How many chambers are in your heart?

When resting, your heart beats about ____ times per minute?

How many valves does your heart have?

What kind of blood vessels are in your body?

Which part of the blood helps heal cuts?

The air in your trachea passes right by your ________.

Which is NOT part of the respiratory system?

Which of your lungs is smaller, and why?

Do the lungs breathe in carbon dioxide or oxygen?

Which of these is the biggest artery in your body?