everything
The part of the potato plant we eat is called the tuber, which is actually an enlarged underground stem.
In rhizomes - i.e the 'root ginger' part of the ginger plant, and the 'potato' part of the potato plant. Howeve the potato is a tuber, not a rhizome.
a tuber
A potato is a plant cell. It is a type of vegetable that grows beneath the ground as part of the potato plant. The cells in a potato contain cell structures typical of plant cells, such as a cell wall and chloroplasts.
It is a common misconception that potatoes are roots. They are actually tubers, and thus potatoes are a part of the potato plant. They are not the roots of any plant.
potato
part of a plant makes the seeds.
Leaves are the part of the tree that makes food through the process of photosynthesis. They contain chlorophyll, a green pigment that captures sunlight to convert water and carbon dioxide into glucose, which is the tree's food source.
The most nutrient part of a potato is the skin... the skin is the very outside of the potato.
What
The part of the sweet potato plant that you eat is the root. The entire root is edible.
part of a plant makes the seeds.