Pregnancy. the body needs to gather nd make a new set of cells to build the baby
Infancy, you grow from microscopic to a baby size in 9 months which is the fastest you ever grow.
Précipitation évaporation transpiration condensation percolation précipitation runoff.
Answer:
Excretion is the removal of material from one living thing, for example. Humans excrete tears, sweat, carbon dioxide etc.
Secretion is the movement of material from one point to another, for example. Humans secrete enzymes, hormones, saliva etc.
Basically in summary excretion is the removal of physical material and secretion is the movement of biological materials from one point to another.
I hope this was clear enough lol
Veins contain valves that ensure blood flows in only one direction. Valves also help blood travel back to the heart against the force of gravity.
Hope this helps.....
