In sync with your heart Crossword

This printable crossword puzzle on the topic of Human Body Systems has 20 clues. Answers range from 4 to 24 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

to allow you in my node
Filters kill invaders
Don't just filter, kill her invaders
tag you're it = destruction activated
I don't belong in outer space, but tissue space
This collects me
I am a certain kind that flows
I recycle because it conserves
I have reservations with blood
I have to return this back to Mr. Bones
I can store this for you
You will be more vulnerable to this without me
I need back my iron
Mr. Bones created me
I am the cells of life
I eventually will replace Mr. Red Marrow
I want to ring your neck, if not your throat first
goalie for the throat
I am first line of this
Procedure takes me out of your throat