Circulatory System Crossword

This printable crossword puzzle on the topic of Human Body Systems has 14 clues. Answers range from 5 to 20 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

The liquid part of the blood
A flap of tissue that prevents blood from flowing backward
Blood vessels that carry blood back to the heart
Take up oxygen in the blood and deliver it to cells elsewhere inthe body
The body's disease fighters
Group of heart cells that sends out signals that make the heart muscle contract
Blood vessels that carry blood away from the heart
Hollow, muscular organ that pumps blood throughout the body
Largest artery in the body
(Singular) upper chambers of the heart
(Singular) lower chambers of the heart
Consists of the heart, blood vessels,and blood
Tiny blood vessels where substances are exchanged between the blood and the body cells
Cell fragments that play an important part in forming blood clots