Peritrophic membrane

Pronunciation: /per-i-troh-fik mem-brayn/

Category: Anatomy

Singular: Peritrophic membrane

Plural: Peritrophic membranes

Definition

A thin, protective layer surrounding the gut lining of some insects, composed primarily of chitin and protein. It acts as a barrier against ingested microorganisms and parasites.

Etymology

Example

The peritrophic membrane helps protect the insect's midgut from harmful bacteria and fungi.

Related Terms

Midgut
Gut barrier
Parasite
Microorganism

Usage Notes

Peritrophic membranes are not present in all insects, and their function may be multifaceted.