Circulatory system Crossword

This printable crossword puzzle on the topic of Human Body Systems has 10 clues. Answers range from 3 to 11 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

What is the great engine of the Circulatory System?
What carries blood back to the heart?
What are the smallest vessels that carries blood?
What is the name of the system that carries blood around the body?
What vessel has think walls?
What is the largest artery?
What artery carries blood along the thigh?
What part of the heart receives the oxygenated blood?
Is the blood oxygenated that goes through the arteries?
What is the size of your heart?