Historians continue to study the social and economic impacts of internment camps on displaced communities.

In many mammals, internal fertilization protects the developing embryo by ensuring that the sperm and egg unite within the mother's reproductive tract.

After the failed uprising, the government designated many critics as internal exiles and forbade them from returning to major cities.

Writers often rely on internal monologues to reveal a character's true feelings without explicit dialogue.

The linguist applied internal reconstruction to trace the phonological changes that led to the modern vowel system.

The linguistics workshop presented several internal reconstructions to explain the vowel alternations.

Health clinics now stock internal condoms and provide instructions on their correct use.

During the sexual health workshop, the nurse demonstrated how to insert an internal condom and emphasized its role in preventing STIs.

The technician measured the internal diameter of the pipe to ensure the new seal would fit.

The surgeon carefully examined the internal oblique for signs of a tear during the procedure.