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

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.

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

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

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

The biopsy revealed multiple keratinizations, which pointed to abnormal epithelial differentiation.

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

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

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