1. Roots • Take in oxygen during respiration. • Absorb and translocate water. • Store food as starch. • Anchor the plant. • Gives off CO2. • Produce nitrogen in legumes.

2. Leaves • Carries out photosynthesis. • Transpiration. • Stores some food. • May be used for asexual propagation.

3. Stem • Translocates water and nutrients from roots to leaves, and sugars and starches from leaves to roots. • Stores food. • Supports leaves, fruit, and flowers. • Growth from the meristem of the terminal bud and lengthens the stem. • Growth in the cambium layer thickens the stem.