Millions of tiny “wires,” called nerves, run through your body. Nerve cells pass electrical signals so that parts of the body can communicate. Signals are sent from your brain to your body parts or from receptors in the body to the brain. Like electrical wires in your house, your nerves have a covering (myelin) so they don’t short circuit. Without this special layer, signals from your brain could not get to your fingers. High concentrations of nerve endings in your fingertips make them more sensitive than other areas. The longest nerve in your body runs from your lower back to your big toe and is called the sciatic nerve.
The intricate design we see in the way the nerves and other body parts work together reminds us to praise God for his control over everything (Psalm 139:13).
These special cards provide an exciting glimpse into various parts of the wonderfully designed human body. God makes each of us fearfully and wonderfully!
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