👉 Billy's red blood cells rush through veins like a marathon, rapidly delivering oxygen to muscles and organs. In seconds, they've traversed arteries, capillaries, and back, efficiently pumping out 2 million per second!
👉 Billy's red blood cells rush through veins like a marathon, rapidly delivering oxygen to muscles and organs. In seconds, they've traversed arteries, capillaries, and back, efficiently pumping out 2 million per second!
https://goldloadingpage.com/word-dictionary/billy blood cells
