Here's why:

* Plasma membrane: This is the outermost layer of both animal and plant cells. It's a selectively permeable barrier that controls what goes in and out of the cell.

* Organelle membranes: Both types of cells have internal membranes surrounding their organelles, such as the nucleus, mitochondria, endoplasmic reticulum, and Golgi apparatus. These membranes help compartmentalize the cell and create specialized environments for different cellular processes.

However, there are some differences:

* Cell wall: Plant cells have a rigid cell wall made of cellulose, which provides structural support and protection. Animal cells lack a cell wall.

* Vacuoles: Plant cells typically have a large central vacuole that stores water, nutrients, and waste products. Animal cells may have smaller vacuoles or none at all.

In summary, both animal and plant cells have membranes, but their specific membrane structures and functions can differ.