The Foundations of Science: Cells and Systems (Textbook)

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“Where were you when I laid the foundation of the earth?”

—Job 38:4

The Foundations of Science introduces children to the wonders of the natural world in light of God’s providential care over creation.

This eight-part series covers an extensive scope of scientific studies, from animals and plants, to the galaxies of outer space and the depths of the ocean, to cells and organisms, to the curiosities of chemistry and the marvels of our planet. Still more, it reveals the intricate order found beneath the surface of creation and chronicles many of the Church’s contributions to science throughout history.

In Cells and Systems: Living Machines, Dr. Heather Ayala explores the fascinating depths found in the smallest of God’s creations—the cell. The complex fabric and workings of the human body are presented vibrantly and clearly so that children can come to understand how they were created, from the division of their cells and the DNA instructions within them; to their muscles and bones; to their cardiovascular, respiratory, nervous, and other systems; to their five senses; to understanding why eating healthy foods and getting plenty of exercise is good for them.    

In this companion workbook, elementary school children will have an additional resource to help them engage with the content, and help them retain it.


  • Coloring pages
  • Crossword puzzles
  • Word searches
  • Journaling
  • Matching and Multiple Choice
  • Fill in the Blank and True/False
  • Short answers and Essays

In addition, each workbook contains activities and arts and crafts bearing both scientific and faith-based themes.

Take a journey back to when God laid the foundation of the world with this groundbreaking science curriculum! 

Heather Ayala, PhD
Publication Date:

1 Review

  • 5
    A great introduction to the human body

    Posted by Charles S. on May 24th 2023

    This is a great introduction to the basics of the human body. It is beautifully illustrated, clearly written, and it covers things we all should know about the human body in order to keep it running properly. The human body is amazing, and Heather Ayala dazzles the reader with the body;s incredible features. There are some interesting points made, such as this: The heart is a muscle, and it needs daily exercise to remain a strong muscle. Doctors recommend moderate exercise for about twenty minutes a day as a minimum. The exercise should increase your heart rate to 65-75 percent of your maximum heart rate. The maximum heart rate is 220 minus your age. For example, if you are 70 years old, your maximum heart rate is 150, and exercise should increase your heart rate to 97 to 112 beats a minute for twenty minutes. This book is very informative, and students will enjoy reading it. And a superb little bonus is this definition of wisdom which appears on page 57: Wisdom is the ability to determine what is good and what is bad. In a way, its our ability to make good decisions. Not only does this book incite a love of learning, it also teaches wisdom, and wisdom is priceless.