The scientist studied how keratin contributes to hair strength and nail growth.

The keratinization of epidermal cells is essential for forming hair and nails and for protecting the body from environmental damage.

As the wound heals, the outer layer keratinizes, forming a protective barrier.

The laboratory observed the skin cells keratinizing under the microscope over several hours.

Over the course of the month, the wound keratinized, forming a tough scab.

The dermatologist examined the keratinic buildup on the patient's scalp and recommended a medicated shampoo.

The biologist examined the keratinous beak of the specimen under a microscope.

The researchers applied a protein treatment to keratinize the damaged tissue and restore its protective function.

Many keratins are expressed in different layers of the epidermis, contributing to skin resilience.

The conservation team carefully sampled the keratineous material from the bird's ancient feather for molecular analysis.