this photo shows the differences between phloem and xylem/functions of stems
description of root: is the organ of a plant that typically lies below the surface of the soil.
function of roots: absorption of water
storage of food and nutrients
description of leaves: organ of a vascular plant
function of leaves: gas exchange occurs here!!!
1) leaves have large SA for fast diffusion
2) contain many stomata to allow movement of gases into and out of the leaf.