circulatory system Crossword

This printable crossword puzzle on the topic of Human Body Systems has 15 clues. Answers range from 5 to 15 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

hollow, muscular organ that propels blood throughout the body
smallest blood vessels
large blood vessels that return deoxygenated blood from the body to the heart
type of circulation that supplies the hearts muscles
type of blood vessel that carry oxygenated blood way from the heart
a flap of tissue that prevents blood from flowing backward
lower chambers of the heart
upper chamber of the heart
liquid part of blood
disease fighters
tissues that flow through the circulatory system
smallest branches of veins
muscular wall that separates the heart into a right or left side
brief period of rest in the heart
smooth layers of cells lining the inside of the heart