Question

Skin cell are flat so they form a ___________barrier

Answer 1

Skin cells are flat so they form an effective prot ective barrier.
Explanation

The skin surface — known as the epidermis — is made up of sheets of cells that are stacked up in layers. One of the roles of the skin is to provide a protective barrier that limits what leaks into or out of the body. A particular layer of the epidermis — referred to as the stratum granulosum — is primarily responsible for forming this barrier. The cells in this layer are sealed together in a zipper-like fashion by structures known as tight junctions.

New skin cells are continuously produced in the lowest cell layers of the epidermis, and move upwards to integrate into the stratum granulosum layer to replace old cells (which also move upwards to leave the layer).