Respiratory system Crossword

This printable crossword puzzle on the topic of Human Body Systems has 11 clues. Answers range from 7 to 11 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

Tiny air sacs found within the lungs where the gaseous exchange takes place
The amount of oxygen needed at the end pf a physical activity to break down any lactic acid
The amount of air inspired (inhaled) and expired (exhaled) in a normal breath
A colourless acid produced in muscle tissues during strenuous exercise when the body is exercising anaerobically at high intesity
A major source or energy for most cells in the body
A sheet of muscle which helps with the respiratory system
Also known as the windpipe
The capacity of the lungs (How much air the can hold).
Blood vessel which is 1 cell thick to aid the gaseous exchange
Tube alond which air passes from the trachea to the lungs
The movement of air from outside the body into the cells within tissues