I've been learning about the circulatory system. Knowing about this topic helps me understand how my heart works. The part I know most about is that if you put all your veins together they'll be 100,000 km long, circling the Earth 2 1/2 times. The part that is the most confusing is how veins are involuntary. I'd like to know more about heart rates.
Kyle, 8th grade
Awesome post, Mr. Kyle. The circulatory system is one of the coolest things EVER; for real. Did you know that your heart keeps its own internal rhythm, without help from your brain? Your brain and body tell it when to speed up and slow down, but it could beat all by itself. And blood never actually touches your muscles! Nutrients simply squeeze through tiny holes in the walls of blood vessels. Whoa. Some amazing Creator must have thought of that.
ReplyDeleteKeep investigating!
-Ms. Jessica