What element increases after giving blood?

White blood cells (recovery time: several weeks)

Red blood cells (recovery time: several weeks)

Platelets (recovery time: a few days)

Plasma (recovery time: several days)

Reticulocytes are immature red blood cells. Red blood cells that haven't fully developed, yet. When our bodies lose a large amount of blood, we rapidly produce reticulocytes, so that our bodies can quickly replenish their red blood supplies. And obviously, when we donate blood, we lose blood.