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What Is Our Heart For? With Dr. Matthew Sleeth - Lesson 59
Episode 61 • 21st January 2025 • Nat Theo Nature Lessons Rooted in the Bible • Eryn Lynum
00:00:00 00:35:02

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Have you ever listened to or felt your heart beat? It’s an amazing sound, but what exactly is happening as our hearts beat all day, every day? Dr. Matthew Sleeth joins us to share about God’s amazing designs in the human heart.

Here’s our trail map:

  • What Is the Cardiovascular System?
  • What Is the Heart Made Of?
  • What Important Job Does the Heart Do? 
  • How Does Blood From Our Hearts Help Our Cells?
  • How Can We Love God With All of Our Heart?

Episode Links:

Blessed Earth - Biblically-based stewardship of creation: https://blessedearth.org/

Reforesting Faith: What Trees Teach Us About the Nature of God and His Love for Us: https://www.amazon.com/Reforesting-Faith-Trees-Teach-Nature/dp/0735291772

24/6: A Prescription for a Healthier, Happier Life: https://www.amazon.com/24-Prescription-Healthier-Happier-Life/dp/1414372280

Almost Amish: One Woman's Quest for a Slower, Simpler, More Sustainable Life: https://www.amazon.com/Almost-Amish-Womans-Simpler-Sustainable/dp/1414326998/

Explore Apologia’s curriculum and classes: https://www.apologia.com/

Apologia’s Human Anatomy and Physiology course: https://www.apologia.com/shop/apologia-advantage-set-anatomy-physiology-with-junior-notebooking-journal/

Save 15% on a Premium Starter Kit from Branch Basics. Ditch toxins and protect your cells with human-safe and animal-safe cleaning products from Branch Basics. Use the code NATURE at www.branchbasics.com/nature 

The Ology: Ancient Truths, Ever New: https://www.amazon.com/Ology-Ancient-Truths-Ever-New/dp/194257228X

Human heart coloring page: https://erynlynum.com/human-heart-facts-for-kids/

Get full lesson guides in  the Nat Theo Club: https://erynlynum.com/club

Listen to the Schoolhouse Rocked Podcast: https://podcast.schoolhouserocked.com/

Order Eryn's book, Rooted in Wonder: Nurturing Your Family's Faith Through God's Creation: https://www.amazon.com/Rooted-Wonder-Nurturing-Familys-Creation/dp/0825447615


Scriptures Referenced in This Episode:

“I praise you because I am fearfully and wonderfully made; your works are wonderful, I know that full well.” Psalm 139:14 (NIV)

“Above all else, guard your heart, for everything you do flows from it.” Proverbs 4:23 (NIV)

“Create in me a pure heart, God, and make my spirit right again.” Psalm 51:10 (NIV)

“Trust the LORD with all your heart, and don’t depend on your own understanding.” Proverbs 3:5 (NCV)

“Jesus answered, ‘Love the LORD your God with all your heart, all your soul, and all your mind.’” Matthew 22:37 (NCV)


Terms Learned in This Episode:

Cardiovascular System: The system God designed that pumps blood through our bodies using the heart organ and blood vessels.

Heart: An organ made of muscle that pumps blood through our bodies.

Oxygen: An element that fuels our bodies and keeps us alive. The heart pumps blood, full of oxygen, through our bodies.

Blood Vessels: A system of tubes that carries blood through our bodies.

Carbon Dioxide: A molecule made from oxygen and carbon. Our bodies create carbon dioxide that needs to be exhaled (breathed out) from our bodies. Our blood helps carry carbon dioxide, a waste product, out.

Pericardium: A thin sac full of fluid that protects the heart muscle.

Endocardium: An inner lining in the heart that protects the heart muscle and its chambers and valves.

Myocardium: The actual muscle that makes up the heart.

Mitochondria: The organelle (“little organ”) inside our cells that acts as a power plant for our cells.

Red Blood Cells: Cells in the body that do not have a nucleus. They have iron (metal) and carry oxygen.

Lungs: An organ that inhales and exhales, bringing oxygen in and out of our bodies.

Aorta: The body’s largest artery (like a big tube) that carries blood full of oxygen from the heart to the rest of the body.

Coronary Arteries: Arteries (like tubes) that carry blood to the heart.


This podcast episode contains paid advertisements from Apologia curriculum and Branch Basics. All testimonies are the honest reviews of the host after personally using each product and service.

Mentioned in this episode:

Wonderfully Made Series

Print the FREE Color-along Calendar and coloring sheets: https://erynlynum.com/wonderfullymade Join the Nat Theo Club for full Lesson Guides: https://erynlynum.com/club

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