Compare plant and human cells.

Plant cells, in addition to the cytoplasmic membrane, are surrounded by a cell wall made of a complex carbohydrate cellulose. In humans, like in other animals, the cell wall is absent.

The main part of the plant cell is occupied by a vacuole with cell sap, in which all sorts of substances (for example, sugars) are dissolved; the vacuole membrane is called a tonoplast. There is no vacuole in human cells.

The reserve substance of plant cells is starch; in some human organs (liver, kidneys, muscles, brain), glycogen is stored in cells.

Plant cells also contain plastids (for example, chloroplasts, in which photosynthesis takes place) and mitochondria. There are only mitochondria in human cells.

In the cells of higher plants there is no such organoid as a cell center, but in human cells it is.