The exercise is when you roll around and move that counts as an exercise. Why kids have 100,000 beating pulses because you don't do that much exercise in a day. Why old people have less beating pulses because they barely exercise, well maybe once or twice but not that much as a newborn baby that has more than 100,000 beating pulses. When you exercise your heart pumps faster. It pumps faster because you're working harder to get blood to all your body parts.
Veins help to get blood to the body parts.
I see lots of veins, and the veins that send blood, and a heart. Trish A baby's heartbeat is faster because a baby is younger. Jessica I think that babies heart needs to beat faster because when their babies it needs to be fast. Becky I notice that after I exercise my pulse is faster. I think that it is because my heart is working faster to get the oxygen I need and pump blood through my body.