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How do desmosomes help epidermal cells stay attached to one another?

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skin rash caused by Lyme disease — skin disease Visible alterations in the texture of the skin, such as rashes and hives, can be indicative of serious disease. For example, one of the first signs of Lyme disease is a circular rash in a bull's-eye pattern on the skin.

Desmosomes are specialized structures that function as zones of adhesion, anchoring contiguous epidermal cells together. Rather than fusing membranes completely, these junctions create a zipperlike contact between adjacent cells, leaving fluid-filled spaces that allow for the passage of nutrients from the dermis.123

These junctions provide structural integrity by distributing mechanical shear force throughout the tissue. This is achieved through their association with keratin filaments (intermediate filaments) that cross the cell interior. By linking these filaments to desmosomes, cells form a nearly continuous fibrous network across the epithelial sheet. This concatenation ensures that epidermal cells remain securely attached and are not easily sloughed off, even when subjected to mechanical stress or abrasion.23