What happens during the systole part of the cardiac cycle?

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

Why does the skin of your finger shrink when you wash clothes for a long time?

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.