The Cardiovascular and Respiratory Systems Answers

All cardiovascular diseases are caused by poor lifestyle choices.

The human cardiovascular system is considered closed because __________.

How many chambers does the heart contain?

Nutrients and waste both enter and leave cells through a process called __________.

Your friend Amanda suffers from a condition that reduces her blood's ability to carry oxygen. Which of the following is the name of that condition?

What percentage of blood is made up of plasma?

White blood cells prevent the loss of blood by causing clotting. Please select the best answer from the choices provided.

Once entering the nose, air moves through both the pharynx and larynx.

The aorta carries blood out of the heart to the rest of the body. Please select the best answer from the choices provided.

Each lung is fed oxygen by a separate bronchus.