That dog is reputed to be vicious.

The cytoplasm contains various substances necessary for cellular activity.

This wall is made of chalky material.

Protein is a nutrient necessary for muscle growth.

The white matter in the brain plays a role in transmitting signals of nerve cells.

This substance has the properties of a crystalloid.

The properties of electrolytes are one of the important themes in physical chemistry.

The bottom sediment of this lake is mainly composed of sand and mud.

His teeth have strong dentin, making them less prone to cavities.

Dentin is a major part of the tooth, located under the enamel.